This is the overcheck strap (X) with the straps sewn to a snap to be able to snap into the dees in the collar.   The complete overcheck comes with the X strap that goes between the ears (thru the bridle loops) makes a x in the face and then has conway buckles to attach the overcheck bit (not Included), the other end snaps into the dee on your collar, it has a buckle for adjustment of the length. Made of Bio and comes in shiny or dull finish. 
Overcheck bit not included.