Jet 531348-8" Smooth Cut Flat File (Package of 12) Plumbing Tools Spline shaft end has flattened

Spline shaft end has flattened sides to allow the use of wrench to turn clutch assembly and is threaded for use with slide hammer for pulling tight spline shafts

Variable speed trigger and 5speed dial provide maximum speed control for any application

The product use for hole saw sets

Gear Box Two-speed gear box with a 3:1 ratio

Torque-drive sockets apply torque to flats of fasteners to prevent corner rounding and increase torque

Jet 531348-8" Smooth Cut Flat File (Package of 12) Plumbing Tools Spline shaft end has flattenedRegular square section , tapers off in both width and thickness toward the point , Double cut on both sides , single cut on edges , Application: general purpose , used for smoothing surfaces and rapidly removing sharp edges and burs on iron and steel flatwork