1.0Mm Width Guhring Straight Face Groove Lh System 104 Insert, 2.0Mm Depth, 17Mm Reach, Tin Coated 1.0Mm Width, 2.0Mm Depth, 17Mm Reach Ga104.0100.005.17.40.L, Tin Coated Type Ga104 Guhring Micro-Precision System 104 Carbide Stick Straight Face Grooving Insert, 4Mm Minimum Circle Diameter. Guhring Series No. 25189 Order Code 4.002 Made In Germany, Guhring Part #9251890040020 Guhring Inc.