Utoolmart 1mm Diamond Twist Drill Bits High Speed Steel HSS for Glass Sea Shells Stone Tiles 5 Pcs

Utoolmart 1.0mm / 0.04" Diamond Twist Drill Bits Technical Parameters Color: Silver Tone Material: Electroplated emery Shank Diameter: 1.0mm / 0.04 inch Drill bit Diameter: 1.0mm / 0.04 inch Package Content 5 Pcs x Diamond Twist Drill Bits Note 1.Cannot be used for drilling wood. Diamond drill bit will generate a lot of heat during high-speed rotation, and the heat will burn the wood. 2. Low-speed drilling is very easy to break the drill bit or causes the diamond particles to fall off. 3.To prevent the drill from slipping, keep the exposed part of the drill bit as short as possible to enhance the strength of the drill