Tooling kits include hardened steel toolholders and high speed steel inserts for turning, threading, profiling, and cut-off work. Inserts are T-15 High Speed Steel (HSS) hardened to Rc 65-67, then finish ground on all sides. They deliver excellent slow speed performance, precision interrupted cuts, and a smooth finish on stainless steel, Inconel, Monel, exotic metals, and plastics. Square shank toolholders and boring bars are CNC machined from 4140/4142 steel bar stock, hardened to Rc 48-50, and then black oxide coated to resist corrosion. Includes one A^3/8" square bar, 4 1/2" long, plus high-speed steel inserts. Mfg: Brownells SPECS: Bar – .375" shank, 4.5" OAL. Inserts – T-15 HSS. Two 1/16" groovers (.062") and two 1/32" groovers (.031"), and one 1/64" groover (.015"). Includes two IS 3007 screws and T-9 wrench. #080-00
