Description Morse Taper Adaptors R8 (Bridgeport) For Tools with Morse Taper Shank Balanced G6.3 @ 12,000 RPM Part Number Description Select Part OM31323 R8 MTA 1 Select OM31324 R8 MTA 2 Select OM31325 R8 MTA 3 Select OM31326 R8 MTA 4 Select