Imagine a single station that lets you comfortably switch between biceps and triceps exercises without fuss. The GCBT‑STK Pro Select machine delivers just that—with intuitive adjustments, smooth motion, and a reliable feel. It’s designed to make arm training feel natural and straightforward, whether you're working out at home or in a shared facility.
Dual-function with easy transition
A clever cam and liftoff arm lets you easily switch from seated curls to press-downs—no repositioning required. Pull the pop-pin, rotate the lifting arm, and go.
Tailored fit for all users
Seat adjusts across seven positions and offers 28 arm pad hole settings, ensuring your elbow alignment and range of motion are just right.
Natural movement mechanics
The arm pad sits at a 30° angle, mirroring comfortable biomechanics and reducing wrist and elbow strain.
Comfort-forward design
Ultra-thick DuraFirm upholstery cushions your arm and seat, helping you stay focused on execution—not discomfort.
Built for performance and stability
Crafted using commercial-grade 2"x2" and 2"x4" steel, this machine stays anchored and dependable through every rep.
Versatile grip options
The multi-grip rotating V-bar supports both overhand and underhand holds—so you can adapt your grip to match various arm training goals.
Progress with resistance
Comes standard with a 160 lb weight stack, with a 235 lb upgrade available to suit bigger goals.
Well-sized for most spaces
With dimensions around 52″ L × 36″ W × 71″ H and weighing about 395 lb, it fits well in most commercial gym layouts while still being a robust station you rely on.
It’s easy to use—just adjust the seat, choose your grip, and pull or push. The motion feels grounded and guided by the cam’s smooth path. Switching between curl and extension is quick, fluid, and doesn’t interrupt your training rhythm.
Complete GCBT‑STK Pro‑Select Biceps & Triceps Machine
Multi-grip rotating V-bar
Adjustable seat with DuraFirm padding
160 lb weight stack (235 lb optional upgrade)
User guide and setup placard
Assembled Dimensions: ~52″ L × 36″ W × 71″ H
Weight: ~395 lb (179 kg)
Frame: Commercial-grade 2″ × 2″ & 2″ × 4″ steel
Adjustability: 7 seat positions + 28 arm pad settings
Grip Options: Overhand & underhand via multi-grip V-bar
Weight Stack: 160 lb standard (235 lb optional)
Angle: Arm pad at 30° for ergonomic movement
Can I easily switch between biceps and triceps movements?
Yes—flip the cam arm up or down with the pop-pin and grab the V-bar to convert between exercises instantly.
Will it accommodate different body types?
With seven seat settings and 28 arm pad positions, users of various heights and arm lengths can position themselves comfortably and precisely.
Is it suitable for heavy use?
Yes. The commercial-grade steel frame and stable design make it durable enough for frequent sessions.
Are there heavier-weight options?
Yes—while the standard stack is 160 lb, you can opt for the 235 lb upgrade if you need more.
Frame & Welds: Lifetime coverage
Pulleys, Bushings, Bearings, Hardware, Plates, Guide Rods: Lifetime coverage
Cables, Upholstery, Grips: Lifetime coverage (normal wear applies)
Frame & Welds: Lifetime coverage
Pulleys, Bushings, Bearings, Hardware: 3 years
Cables, Upholstery, Grips, Other Components: 1 year
Free Shipping: We offer free shipping on all outbound orders.
Return shipping costs are the customer’s responsibility unless the item is defective or incorrect. Please view our Return Policy for more information
Delivery Area: We currently ship within the United States
Processing Time: Orders are processed within 1-3 business days, Monday to Friday.
Cut-off Time: Orders placed before 5:00 pm Central Standard Time begin processing time the same business day. Orders after will begin processing the next business day
No Shipping Days: Orders are not processed on weekends or public holidays.
Estimated Shipping Times: Orders typically arrive within 1-7 business days (Monday-Friday) after processing, depending on the destination.
For Products ordered under 150lbs
Delivered to your doorstep or driveway
Transit time: 1–7 business days
Tracking number provided
For large/heavy items (150+ lbs)
Delivered curbside with a liftgate
Appointment and adult signature required
Products are not brought inside or upstairs
Orders are processed within 1–3 business days (Monday–Friday).
Orders placed before 5:00 pm CST begin processed the same business day; those placed after begin processing the next business day.
Orders are not processed on weekends or public holidays.
Orders arrive within 1–7 business days (Monday–Friday) after processing, depending on destination.
Total timeline: 2–10 business days from the date you place your order.
For full details, please see our Shipping Policy
Return Period: 30 days from delivery date.
Refund Processing: Within 10 business days from receipt.
Return Shipping: Covered by the customer unless the product is defective or incorrect.
Restocking Fees: We do not charge restocking fees.
For full details, please see our Return & Refund Policy
Shipping is available to all 50 U.S. states, including Alaska and Hawaii. We do not ship International
We accept the following methods:
For details, please see our Payment Policy
You can reach our customer service team
sales@primal-fitness.shop
+1 (615) 568-8943
Mon-Sat: 9AM - 5PM CST
Live Chat: On the bottom right of your screen, you can reach out to one of our support agents during business hours
Imagine a single station that lets you comfortably switch between biceps and triceps exercises without fuss. The GCBT‑STK Pro Select machine delivers just that—with intuitive adjustments, smooth motion, and a reliable feel. It’s designed to make arm training feel natural and straightforward, whether you're working out at home or in a shared facility.
Dual-function with easy transition
A clever cam and liftoff arm lets you easily switch from seated curls to press-downs—no repositioning required. Pull the pop-pin, rotate the lifting arm, and go.
Tailored fit for all users
Seat adjusts across seven positions and offers 28 arm pad hole settings, ensuring your elbow alignment and range of motion are just right.
Natural movement mechanics
The arm pad sits at a 30° angle, mirroring comfortable biomechanics and reducing wrist and elbow strain.
Comfort-forward design
Ultra-thick DuraFirm upholstery cushions your arm and seat, helping you stay focused on execution—not discomfort.
Built for performance and stability
Crafted using commercial-grade 2"x2" and 2"x4" steel, this machine stays anchored and dependable through every rep.
Versatile grip options
The multi-grip rotating V-bar supports both overhand and underhand holds—so you can adapt your grip to match various arm training goals.
Progress with resistance
Comes standard with a 160 lb weight stack, with a 235 lb upgrade available to suit bigger goals.
Well-sized for most spaces
With dimensions around 52″ L × 36″ W × 71″ H and weighing about 395 lb, it fits well in most commercial gym layouts while still being a robust station you rely on.
It’s easy to use—just adjust the seat, choose your grip, and pull or push. The motion feels grounded and guided by the cam’s smooth path. Switching between curl and extension is quick, fluid, and doesn’t interrupt your training rhythm.
Complete GCBT‑STK Pro‑Select Biceps & Triceps Machine
Multi-grip rotating V-bar
Adjustable seat with DuraFirm padding
160 lb weight stack (235 lb optional upgrade)
User guide and setup placard
Assembled Dimensions: ~52″ L × 36″ W × 71″ H
Weight: ~395 lb (179 kg)
Frame: Commercial-grade 2″ × 2″ & 2″ × 4″ steel
Adjustability: 7 seat positions + 28 arm pad settings
Grip Options: Overhand & underhand via multi-grip V-bar
Weight Stack: 160 lb standard (235 lb optional)
Angle: Arm pad at 30° for ergonomic movement
Can I easily switch between biceps and triceps movements?
Yes—flip the cam arm up or down with the pop-pin and grab the V-bar to convert between exercises instantly.
Will it accommodate different body types?
With seven seat settings and 28 arm pad positions, users of various heights and arm lengths can position themselves comfortably and precisely.
Is it suitable for heavy use?
Yes. The commercial-grade steel frame and stable design make it durable enough for frequent sessions.
Are there heavier-weight options?
Yes—while the standard stack is 160 lb, you can opt for the 235 lb upgrade if you need more.
Frame & Welds: Lifetime coverage
Pulleys, Bushings, Bearings, Hardware, Plates, Guide Rods: Lifetime coverage
Cables, Upholstery, Grips: Lifetime coverage (normal wear applies)
Frame & Welds: Lifetime coverage
Pulleys, Bushings, Bearings, Hardware: 3 years
Cables, Upholstery, Grips, Other Components: 1 year
Free Shipping: We offer free shipping on all outbound orders.
Return shipping costs are the customer’s responsibility unless the item is defective or incorrect. Please view our Return Policy for more information
Delivery Area: We currently ship within the United States
Processing Time: Orders are processed within 1-3 business days, Monday to Friday.
Cut-off Time: Orders placed before 5:00 pm Central Standard Time begin processing time the same business day. Orders after will begin processing the next business day
No Shipping Days: Orders are not processed on weekends or public holidays.
Estimated Shipping Times: Orders typically arrive within 1-7 business days (Monday-Friday) after processing, depending on the destination.
For Products ordered under 150lbs
Delivered to your doorstep or driveway
Transit time: 1–7 business days
Tracking number provided
For large/heavy items (150+ lbs)
Delivered curbside with a liftgate
Appointment and adult signature required
Products are not brought inside or upstairs
