Ocut スペードドリル深穴ドリルホルダー暴力 U ドリル使い捨て内部クーラントロングドリルビットシャンク

Precautions for installation of shovel drill
Clean the blade groove by blowing with an air gun or other methods
Tighten the screws evenly on both sides to lock the blade
Do not touch the tip of the knife when installing