Editing Handle (section)

== Specific needs ==
Other requirements may apply to specific handles:
* A sheath or coating on the handle that provides [[friction]] against the hand, reducing the gripping force needed to achieve a reliable grip.
* Designs such as recessed car-door handles, reducing the chance of accidental operation, or simply the inconvenience of "snagging" the handle.
* Sufficient circumference to distribute the force comfortably and safely over the hand.<ref>{{cite journal
 | last = Wang
 | first =Mao-Jiun J. 
 | title =The Effect of Handle Angle on MAWL, Wrist Posture, RPE, and Heart Rate
 | journal =Human Factors
| date =Winter 2000
 | pages =553–565
| volume     =42
| issue      =4
 | doi =10.1518/001872000779698079 
 | pmid =11324850 
 | citeseerx =10.1.1.1000.7796 
 | s2cid =7243355 
 }}</ref>  An example where this requirement is almost the sole purpose for a handle's existence is the handle that consists of two pieces: a hollow wooden cylinder about the diameter of a finger and a bit longer than one hand-width, and a stiff wire that passes through the center of the cylinder, has two right angles, and is shaped into a hook at each end. This handle permits comfortable carrying, with otherwise bare hands, of a heavy package, suspended on a tight string that passes around the top and bottom of it: the string is strong enough to support it, but the pressure the string would exert on fingers that grasped it directly would often be unacceptable.
* Design to thwart unwanted access, for example, by children or thieves. In these cases many of the other requirements may have reduced importance. For example, a child-proof doorknob can be difficult for even an adult to use.