There is a finger gap adjustment on the right and left of the bend brake to allow for different gauges of material

especially copper

Type For 20-L pail Air Motor Model AM-7B Reduction Ratio 1:1 Allowable Viscosity Range (Reference) 8702 PSI -  s (20 seconds/NK-2) or less Operation Air Connection G1/4” Material Used in Agitating Blades POM (Polyacetal) Material Used in Agitating Shaft SUS303 Mass  7

The Easy Start Valve feature allows for a easier start up using less starting amps

Grizzly H5689 - Indexable End Mill 3 pc. Set 75 dBA There is a finger gapDont let the price fool you! Made to exacting specifications and provides stable machining on even the toughest materials. Supplied with 1 2" shanks, carbide inserts, fitted case, and a wrench. Polished, black oxide finish. Includes sizes: 1 2" W x 1 1 8" L, 3 8" W x 1 1 8" L, and 5 8" W x 1 3 8" L.