When using tools employees may assume awkward postures including bending, stooping, or extended reaching. Awkward postures maintained for long periods of time may cause fatigue, discomfort and pain, especially when heavy tools are used.

For power grip, handle should be between 1.25-2” in diameter

Length> 4 inches - Add 0.4” of length if accommodating users wearing gloves

Tools with bent handles are better than those with straight handles when the force is applied horizontally (in the same direction as your straight forearm and wrist)

For tasks requiring high force, select a tool with a handle longer than the widest part of your hand 

Repeatedly using a single finger to activate triggers on power tools may cause overuse of tendons and muscles leading to irritation, swelling, pain and eventually immobility

Improper orientation of tool handles may cause awkward position of the hand, wrist, or arm and increase force requirements of the task.