High Speed Steel Extended Twist Drill Bits 7.8mm Drill Dia. 200mm Length 2 Pcs 8mmx16mmx5mm for 3V CR123A Battery

for 3V CR123A Battery

Outer Dia : 44mm/1

Material: Carbon steel construction with zinc plated

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High Speed Steel Extended Twist Drill Bits 7.8mm Drill Dia. 200mm Length 2 Pcs 8mmx16mmx5mm for 3V CR123A BatteryDescription 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