1. Leesho offers a complete line of Metal Twist Drill Bits, such as straight shank, taper shank, etc; 2. Process: fully ground 1. About Yukai: Yukai Precision Mold parts Co., Ltd., founded in 2005, is a professional company in research, development and manufacturing of precise standard mould components, which are used in precision punch mould, plastic mould, die casting mould, semiconductor mould ...