FingerFlex: Spring-Powered Hangboard Training

FingerFlex is a spring-powered, adjustable-resistance hangboard built for climbers, calisthenics athletes, and anyone serious about grip. Instead of relying on mounting points or added weight, FingerFlex uses stackable stainless springs to deliver smooth, controllable resistance you can actually feel — anywhere you can pick it up. Whether you’re warming up, rebuilding capacity, or pushing strength, FingerFlex lets you dial in load, edge depth, and hand position in seconds. Spring resistance increases as you compress, so you can load the fingers isotonically up to your target force, then hold isometrically at the point you choose (or make it fully isometric by bracing with your second hand / an obstruction). It’s a simple way to mimic the “load → hold” feel of hangboarding without needing a wall setup. Adjustable spring resistance (light → heavy) At the core is a modular spring system with interchangeable, stackable springs for precise progression — from very light loads for warm-ups and low-intensity work to serious high-resistance strength training. From ~2. 5 kg / 5. 5 lb at the low end (intro / warm-up loads) Up to 75 kg / 165 lb+ total force at the top end (fully loaded) Tune resistance by swapping and stacking springs for progressive overload Included: 15 stainless springs total — 5 Light, 5 Medium, 5 Heavy (so you can mix, match, and keep spares). 4 base edges + micro-adjustment in 1 mm steps FingerFlex isn’t “one edge fits all. ” Rotate and flip the board to access four base edge depths: 10 mm / 15 mm / 20 mm / 25 mm Then fine-tune with MegaGrip spacers in 1 mm increments to match your preferred crimp depth, training phase, and comfort. Adjustable height for hand size + stronger positions FingerFlex allows height adjustment to suit small or large hands so you can sit into a natural crimp position with better comfort and control — helping you train hard while staying mindful of finger stress.

FingerFlex is a spring-powered, adjustable-resistance hangboard built for climbers, calisthenics athletes, and anyone serious about grip. Instead of relying on mounting points or added weight, FingerFlex uses stackable stainless springs to deliver smooth, controllable resistance you can actually feel — anywhere you can pick it up.

Whether you’re warming up, rebuilding capacity, or pushing strength, FingerFlex lets you dial in load, edge depth, and hand position in seconds.

Spring resistance increases as you compress, so you can load the fingers isotonically up to your target force, then hold isometrically at the point you choose (or make it fully isometric by bracing with your second hand / an obstruction). It’s a simple way to mimic the “load → hold” feel of hangboarding without needing a wall setup.

At the core is a modular spring system with interchangeable, stackable springs for precise progression — from very light loads for warm-ups and low-intensity work to serious high-resistance strength training.

FingerFlex allows height adjustment to suit small or large hands so you can sit into a natural crimp position with better comfort and control — helping you train hard while staying mindful of finger stress.