Makes brake pad replacement a quick and easy job A quick way to spread brake pads and compress disc brake pistons for pad replacement on single, double and quad piston callipers Simultaneously compress all four pistons on quad piston applications Can be used while calliper is on the vehicle or hanging free 29100 PLATE DIMENSIONS: 220" thick. 3 3/4" wide. 1 7/8" reach (top of plate to outrigger arm) Spreads 2 1/2" Tool plates do not rotate