Made of premium grade high-speed-steel for excellent dispersion, hardness, strength and resistance to abrasion. Delivers improved performance and extended life. 135 degrees split-point self-centering bits improve penetration and allow faster drilling with less thrust. Set 758IE291 features a black and gold surface treatment that adds roughness and lets bits expel fillings more easily.(USA)
HSS Drill Bit Set - 29 piece; Black and gold surface treatment, 1/16" x 1/2" x 64ths, go-anywhere waterproof case.