d ring 214 fig7 the line lock 610 is sewn in and threaded through grommets therein not shown so as to run smoothly a user then simply puts on the cuff 216 and with one hand tightens the line lock 610 by pulling on elastic line 620 which draws the two sides of the arm cuff 39 s nylon webbing together thereby securing the arm cuff 216 to the arm when the user wants to remove the arm cuff 216 they release the line lock 610 and the arm cuff 216 loosens allowing the user to slide arm cuff 216 off the line lock 610 and elastic line 620 prevent the cuff from falling down the arm when the arm is in the down or relaxed position an additional prevention from allowing the cuff 216 to fall down the arm is to line the inside of the cuff 210 with a non slip type material such as rubber many other materials are possible to affix to the padding that add friction between the arm cuff and human skin or clothing material non friction material may be added with or without a mechanism to hold the cuff to the arm or may be made as part of the padded backing material in another embodiment of the design of the arm cuff the cuff may not be made of nylon webbing with padding but of plastic or some other rigid material that may or may not be lined with non slip material in another embodiment of the design of the arm cuff there may be various types of clips that tighten the cuff together or hold the cuff to the sleeve of the user the clips may involve elastic metal springs plastic screws bolts.