10 negative rake carbide BITS for many models of brake lathes. .030 radius. Replaces the original bits on many brake lathes including:Ammco 3000, 4000, 4100, 6900, 7000, 7700.OEM / Aftermarket Interchanges:ALL TOOL: 4310, 4330, 4331.AMMCO: 6914, 691410,...