We are the leading manufacturer for various kinds of drill bits. Details are as following:1.Standard: 1.0-25.0mm for DIN338,DIN1897,DIN340; 1/16”-1” for ASME,screw machine,taper length.2. Steel material: M2(6542),M35,M42,HSS9341,HSS4341,HSS 42413. Process: fully ground, milled, polished, roll forged4. Point angel: 118degree, 118degree split point, 135degree split point5. Surfce finishing: bright finished,black oxide, Tin-coated, black & white, black & gold, coffee color.6. Shank: straight shank, reduced shank, taper shank7. Hardness: 63-66HRC
