3.7mm Twist Drill High Speed Steel Bit HSS-4241 for Steel,Aluminum Alloy 10pcs

Description:

Material : High Speed Steel 4241

Type : N Type 118 degree

Bit Diameter : 3.7mm/0.15"

Cutting Edge Length : 46mm/1.81"

Total Length : 75mm/2.95"

Weight: 43g

Main color: Silver

HRC: 62-63

Package Content: 10pcs x Twist Drill Bit.

How to Use Twist Drill Bits

• Ensure the left and right cutting edges of the drill are symmetrical when drilling.
• Observe the uniformity of the spark while drilling, adjust the pressure in time, and pay attention to the cooling of the bit.