GENERAL TECHNICAL INFORMATION BLADE & HOLDER DESIGNATION SYSTEM Holder / block type Method of retaining insert Shank size TH: T-Clamp holder (bar) C: With coolant hole Dimensions 0: Wedge clamping 1: Screw clamping TH 1 0 1 26 4 Hand of holder Tool style Application Insert size R = Right hand L = Left hand 1 = External O.D Blank = Double ended blade 1. Blade (double-ended) 9 = Internal I.D. (bore) 2. Integral tool holder R L 6. Boring bar I.D. (bore) 1299