They are produced with a cleverly shaped strong stainless steel double hook, which gives stability when under tension and a pulling force that feels great and mimics a “real grip” feel when in use. The metal hooks have a thin v-shaped section as part of their design with an elastic loop attached. This innovative elastic loop is placed around a finger and prevents the hook from flopping down under its own weight when grabbing a bar overhead or when your arms are forward. This makes the Hook aid more versatile than existing hook devices, which only perform well when lifting upwards from the ground.
Size Guide
Size Guide for Looped, D-Ring and Hook aids

A = circumference of narrowest part of wrist
A: Wrist
Small/Standard: | Large: |
135mm – 185mm | 180mm – 220mm |
5.3″-7.2″ | 7.1″-8.7″ |
(n.b. measurements are approximate)