Key Features: No Jaws to change and optimal for shops with 2 or more brake lathes. Includes: (1) Quick Chuck (3 jaw chuck, 5" diameter) - (1) Quick Chuck (3 jaw chuck, 5" diameter w/Truck Jaws). (1) Small Backing Plate (4.25" diameter). (1) Standard Backing Plate (5" diameter). (1) Toyota Backing Plate (6.25" diameter). (1) Large Backing Plate (7.25" diameter). (1) Chuck Key.