A single-point tool has only one cutting edge, while a multiple-point tool has two or more cutting edges . 单刃刀具只有一个切削刃,而多刃刀具有两个或两个以上的切削刃。
Subland twist drills with morse taper shanks for holes prior to tapping screw threads 攻螺纹前孔用莫氏锥柄多刃阶梯麻花钻
Subland twist drills with parallel shank for holes prior to tapping screw threads and for relief countersinks 留隙沉头钻和攻螺纹孔前用直柄多刃阶梯麻花钻
Subland twist drills with morse taper shank for clearance holes and countersinks for countersunk head screws 留隙孔用锥柄多刃阶梯麻花钻和沉头螺钉用沉头钻
Subland twist drills with parallel shank for clearance holes and counterbores for hexagon socket head cap screws and slotted cheese head screws 留隙孔用直柄多刃阶梯麻花钻和内六角头圆头螺钉和一