MOSTIN JLIFE drill bit titanium drill bit set for metal drill bits set original japan step drill bits heavy duty 6pcs gerudi step drill bit for stainless steel metal drill bit heavy duty serrated drill bit set heavy duty drill bit original japan surplus

MOSTIN. Features: 100 Brand new and high quality. The Drill is not easy to be broken. The ladder of its unique structure, a bit can open a variety of specifications of aperture. Do not need to use center punch, compared with the ordinary twist. Deburring, chamfering, elliptic hole enlargement, twist drill, the. function of them was unable, but it is possible. The use of tools: drill, bench drill. Work while water cooling, can. effectively extend the service life of drill bit, recommend drilling rate of 250-250 RPM. Specifications: Material: High-speed steel. Color: Gold. Features: 100 Brand new and high quality. The Drill is not easy to be broken. The ladder of its unique structure, a bit can open a variety of specifications of aperture. Do not need to use center punch, compared with the ordinary twist. Deburring, chamfering, elliptic hole enlargement, twist drill, the. function of them was unable, but it is possible. The use of tools: drill, bench drill. Work while water cooling, can.