MT-RSR | 20040 | Light Truck Dual Chuck Adapter Set | 1" Bore, Brake Lathe Compatible Kit Includes: Lite Dual Chuck Adapter – 3-Jaw Chuck (5" diameter, double-sided) (Part# 20040) Small Backing Plate – 4 3/4" diameter, for small hubless rotors and drums (Part# 10047) Medium Backing Plate – 5" diameter (Part# 10043) Toyota Backing Plate – 6 1/4" diameter, ideal for Toyota Tundra (Part# 10054) Large Backing Plate – 7 1/4" diameter, for large hubless rotors and drums (Part# 10046) Wrench – 3/8" drive (Part# 10044) Brake Lathe Compatibility: Fits all standard brake lathes with a 1" arbor. Interchangeable Part Numbers: 20040, AS8240, TMRAS8240 Key Features & Benefits: Lightweight and Durable: Complete adapter set weighs only 17 lbs, offering easy handling and reduced fatigue. Corrosion-Resistant Aluminum: High-quality aluminum construction ensures rust resistance and extended service life. Efficient Dual-Sided Chuck: Dual-sided design eliminates the need for jaw changes, with car jaws on one side and truck jaws on the other, speeding up your work. Versatile Centering Range: Handles centering holes from 2 1/8" to 5 3/4", providing broad application coverage for various rotors and drums.