Therafin’s Permobil Corpus 3G Bayonet Style Bracket is attached to a Therafin half tray that is made out of 3/8" clear polycarbonate. Polycarbonate is virtually unbreakable. The bracket slides the tray on from the front, and flips the tray up and out to the side for easy transfer. Bracket fits the Permobil Corpus 3G armpads and mounts under the armpad and provides a bayonet style flip mechanism that allows the tray to by loosening a knob. The Standard version of the bracket accomodates pad thicknesses up to 1-1/4". Trimline shape half trays have a straight outer edge that offers support for people with weakness on one side and allows more belly clearance.