The Derby Worx Pro Axle Bender is an adjustable axle bender for pine wood derby cars, designed to give builders a wider range of bend angles. By adjusting the simple stop collar, bend angles of 0.5° to 10° can be precisely achieved for a wide range of tuning options, The tool features Derby Worx’s exclusive “Bending Cup” which allows stainless steel & titanium axles to be correctly bent, a bending chart takes the guess work out of axle bending angles and makes Rail Rider or a straight on alignment a snap! Will also work with the standard BSA axles. Seller recommends polishing out the burrs on the stock axles before bending them.