1) user upper limb various joints may move freely, avoid because of many complications which applies the brake to cause;
2) the user finger joint moves when because of foundation plate's mask, but cannot the job, maximum limit avoid having behaviors and so on cupping;
3) this hand fixed wrap (wave board) foundation plate by elastic revertex framing, even if the user makes an effort to whip the protective covering, the foundation plate cannot burst, the hand because of will also not vibrate is injured;
4) the protective covering double-decked is the ventilation nettings makes, attracts the perspiration to be strong, skill place Canada has the cushioning, when avoids both hands move because of the skin which rubs causes suffering injury;
5) may begin using spare to the high risk patient ties a belt approximately;
6) easy to clean the disinfection, may use repeatedly, has the environment-protective;