The YY Vertical Climbing Balls are solid rubberwood training spheres for building pinch, grip and suspension strength. Old-school, and still one of the best ways to train a full-hand grip without a wall.

A sphere gives you an unstable grip that recruits fingers, forearms, shoulders and core together. Hang them from a rig or door frame for dead hangs, weighted pull-ups and suspended core work. Three diameters let you match the challenge to your level: 8cm for beginners and warm-ups, 10cm for regular conditioning, 12cm for advanced pinch and pull-up strength. The lightly textured rubberwood is durable and stays kind to skin under heavy use.

Why you'll love it

• Full-hand grip training – pinch, grip and suspension strength in one tool
• Three sizes – 8cm, 10cm and 12cm to match your level
• Solid rubberwood – durable, lightly textured and skin-friendly
• Versatile – dead hangs, pull-ups and core training from any rig or door frame

Good to know

• 8cm: beginners and warm-ups; 10cm: regular conditioning; 12cm: advanced pinch and pull-up work
• Recruits fingers, forearms, shoulders and core together

Who it's for

Climbers at any level who want to build pinch and open-hand strength away from the wall. Pick the diameter that matches your level.