· 正確的定點提昇您加工的質量。Precise positioning improves processing quality.·含鈷高速鋼(HSS-CO)材質。The material is HSS-CO 5%.·在鑽孔時鑽頭尖點先接觸定點的位置，所鑽出的孔真直度佳，且不易崩刃，壽命增長。Positioning first before drilling. The holes will be straight and the tool life will