2pcs 9mm High Speed Steel Twist Drill Bit with Hex Shank 125mm Length M3x21mm+6mm Foam lid liners are coated

Foam lid liners are coated with a torque-activated coating

Clear cap and number index design for quick visual identification

These wheels are ideal for RC Aircraft Model Toy

when push the button

2pcs 9mm High Speed Steel Twist Drill Bit with Hex Shank 125mm Length M3x21mm+6mm Foam lid liners are coatedDescription: 1. Made of high speed steel with dual coating of gold titanium and black nitride for better lubrication, smoother drilling. Increase the hardness of the drill, with good wear resistance and durability. 2. Can drill with less force and good radial stability. Easier chip evacuation, better heat dissipation and increased drill durability. 3. Suitable for drilling holes in alloy steel, wood, nonferrous metal, cast iron and hard plastics. 4.