fastener tools bit holders 1/4 hex drive for 1/4 hex inserts bit holders ... chucks part number female thread hex opening in overall length in mm overall ... diameter in mm opening depth in mmhex extensions male hex drive with 1/2 ... male square part number hex drive in type of lock overall length in ... mm 3/8 square drive sockets sae 6 point ... double hex short standard length a c d part part ... hex overall diameter number number opening ... length nose end 6 point double hex in a b diameter opening drive end depth ... c d b part number overall length in mm 490 2 1/8 54 rm-490 2 7/8 73 rm-490-4 4 ... quick releasing chucks part number hex opening in square drive in overall ... length in mm body diameter in mm ex-501-2 ex-501-3 ex-501-6 ex-501-8 7/ ...