High Speed Steel Extended Twist Drill Bits 4.2mm Drill Dia. 300mm Length 2 Pcs 16 X 14 X 330mm * Total Size: 57*64*22mm(L*W*H)

* Total Size: 57*64*22mm(L*W*H)

Total Length: 320mm/12

Package Included:  1 x Car Window Switch

2 x RG58 SMA Male to SMA Male Coaxial Cable

High Speed Steel Extended Twist Drill Bits 4.2mm Drill Dia. 300mm Length 2 Pcs 16 X 14 X 330mm * Total Size: 57*64*22mm(L*W*H)Description 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