is surface mounted on wall or partition using No 10 self tapping screws (supplied by others). Mount at designated height above finished floor. OPERATIONSpindle revolves ½ revolution for each operation and then returns to its original position. Roll core prevents access to release pin and cannot be removed from spindle until exhausted and screw is loosened withkey. Unit is replenished by releasing a concealed pin which in turn releases a spring lock mechanism on spindle.