8″ Front Mount Top Reversible 3-Jaw Plain Back Chuck ~ Made of high quality steel. ~ Hardened and ground. ~ Lathe chuck wrench supplied. ~ Square & parallel to .0002″. ~ Front mount chucks are designed to be used with rotary tables and other devices where back mounting chucks can not be used. ~ Top Reversible jaws. ~ Maximum RPM is 3,000. ~ T.I.R. is .0032″. ~ 3 pieces of M10 screws. Made of high quality steel. Hardened and ground. Lathe chuck wrench supplied. Square & parallel to .0002″. Front mount chucks are designed to be used with rotary tables and other devices where back mounting chucks can not be used.