High-speed steel, high quality with good durability for you to use.
Drill the screw holes and keep on the same axis.
4 Sizes in one drill bit set( 6#,8#,10#,12#), which meet your different needs perfectly.
Convenient to change the bits with the included mini hex wrench which loosens and tightens the bits to hold and release as needed.
Apply to with a clamp or joint drilling machine, suitable for drilling in the hard wood and wood floor, machine screw for wood screw.

Technical Details

Product Details

Package Dimensions
Width : 2.9 inch
Height : 0.9 inch
Length : 4.5 inch

Shipping Weight: 4.64 ounce (View shipping rates and policies)

ASIN : B01HCHZQXE

Product Description

Specification:
Material: HSS Drill 4241
Black chamfer drill body material: Steel 45 Dimension:
6# 2.38mm(0.0937inch) x 55mm(L)
8# 2.78mm(0.1094inch) x 60mm(L)
10# 3.175mm(0.125inch) x 63mm(L)
12# 3.56mm(0.14inch) x 65mm(L)
Shank: 1/4 Hex Shank

Package Included:
4 x Countersink Drill Bits
1 x Hex Shank