Specification Brand : MINI GROOVE 'N TURN BulletPoint1 : See Downloads section below item photos for detailed product information, technical information and compatible inserts. BulletPoint2 : .325" Minimum bore. Use only with threading inserts and grooving inserts .063" and smaller. BulletPoint3 : This bar is compatible with grooving and threading inserts. Bar includes: MGC1 Clamp, F31 Screws and W31 Wrenches. BulletPoint4 : 8:1 Diameter to Length Extension Ratio. 2" maximum extension recommended for this bar. BulletPoint5 : U.S. Patent 6,722,825 and 6,974,282. ItemName : THINBIT MGT14C Carbide Internal Grooving and Threading Bar, 1/4" Diameter, 2" Reach, 0.325" Minimum bore ItemShape : .250" Diameter X 6.504" Overall Length. ItemTypeKeyword : boring-bars Manufacturer : Kaiser Tool Company, Inc. Material : Carbide ModelNumber : MGT NumberOfItems : 1 PartNumber : MGT14C ProductSiteLaunchDate : 2016-10-06T20:48:24.653Z UnspscCode : 23241601