型號：DPC & DPNfSteel用於鋼料■ DPC Internal & DPN External coolant. 內冷及外冷鑽■ 3D, 5D, 7D drills. 3、5、7 倍徑鑽孔深度■ 140° Tip angle, Reinforced shank. 140° 鑽尖, 銑刀柄■ UNIX Coating. 高鋁鈦塗層技術