Traditional method of reducing the trigger pull on Colt Single Actions. Spacer slips between mainspring and frame, changes the spring geometry to reduce tension on the hammer. Neoprene rubber spacer is more durable than leather and won’t absorb and hold moisture. Safer and easier than filing or stoning the spring.Easily shaped for a precise fit in all Colt SAA and clones. Mfg: Brownells SPECS: Neoprene, black. Approximately .650" (16.51mm) long, .290" (7.36mm) wide, .187" (3.8mm) thick.