Manufactured from high grade steel these toolholders are accurately machined and ground. Toolbits are held parallel and straight to the shank giving maximum support to the cutting edge. Set screws are made from heat treated alloy steel with hardened points for increased resistance to wear. Each holder comes complete with an allen key but without toolbit. Left Handed Offset Shank Holder Size: 1/2 x 1-1/8 x 6 Tool Bit Size: 5/16 inch For Lathes of Approx Swing: 14 to 16