ltem description from the seller
Description: Features:Additional lower wheels and storage rackCan be mounted on bench, clamped in vise or use with optional welded standMachine provides outstanding performance on small jobs like tanks motorcycle, tank covers, seat cowls and aircraft filletsSuitable for a variety of other tasks, including shaping, fabrication, and smoothing dents and welding seams in fenders, hoods and trunk panelsAnvil yoke is adjustable on both sides of the axle support with thumb screws so it can be trued with the upper wheelThe design is simple, with few moving parts. The base takes the form of a large "C," and is usually made of fabricated steel. It is very sturdy and rigidSpecifications:Type: English WheelMaterial: SteelWheels: Hardened SteelCapacity: 16 Gauge Mild Steel, Aluminum, CopperThroat Capacity: 15-3/8 "Upper Wheel Diameter: Flat; 5-7/8"Lower Wheel Diameter: 2"Lower Wheel Contours: Flat; 1/2" r.1" r.; 1-1/2" r.; 2-1/2" r.; 5" r.; and 9" rOverall Dimensions: 10"(L) x 18-1/ 4"(W) x 24"(H)Assembly Required: YesPackage Content:English Wheel Shaping BenchtopHardwareManual