Table 2.

Required cable forces to operate voluntary closing and opening prostheses.

Voluntary closing prostheses	Required cable force (N) to create a 15-N pinch force2	Voluntary opening prostheses	Required cable force (N) to achieve a 50-mm prehensor opening3
TRS Hook, Grip 2S	33	Hosmer Hook 5XA, 2 bands	50
Hosmer APRL Hand, 52541	61	Hosmer Sierra Hand, ungloved	70
Hosmer APRL Hook, 52601	62	Hosmer Hook 5XA, 3 bands	71
Otto Bock Hand, 8K24	98	Hosmer Sierra Hook, setting 2	82
Hosmer Soft Hand, 61794	131	Otto Bock Hook, setting 2	94