Draper M6 x 75mm Spline 10mm Insert Bit for Mechanic's Bit Sets 21932, 33614 and 59985 DR-26281Expert Quality, 10mm insert bits for use with Mechanics Bit Sets, Stock Nos. 21932, 33614, 59985 and other manufacturers similar sets. Sold loose.5010559262816PartNo-YMH40/SCDraper 26281