Hard Taper shank twist drills Our factory supply: end mill,gear hob,machine tap,hobbing ... , diamond tool, thread tap, ball nose, twist drill, HSS tool bits, gear hob,....Product features: Hard Taper shank twist drillsStandard: DIN338 Production technics: 1. Roll ... .5, 2.0, 2.5, ^ ~ 20.0mms Note: Split point drills available from 3mm and above sizes. Hard Taper shank twist drills