High Speed Steel Extended Twist Drill Bits 4mm Drill Dia. 250mm Length 4 Pcs 3mm X 16mm 30 x 30mm/1

30 x 30mm/1

8pcs x Rubber Mounts

Main Color: Gold Tone

solid zinc alloy core with Nylon shell

7L V8 - Gas 2019

High Speed Steel Extended Twist Drill Bits 4mm Drill Dia. 250mm Length 4 Pcs 3mm X 16mm 30 x 30mm/1Description 1. Made of high speed steel. HSS(High Speed Steel) enables the drill body harder and can keep a longer drilling life. 2. With the twisted design, it can improve cutting accuracy by centering the tip. It can avoid displacement of the drill bit during work, and at the same time remove debris and particles faster and easier. 3. Suitable for processing non ferrous metals, such as copper and aluminum, and also suitable for hard plastics. When