Made by a small tool manufacturer in the Czech Republic
The set comes with 3 sizes, 3, 4 and 5 mm and will make tapered pilot holes for screws #4 through #8
Blades have threaded tips with machined spiral flutes
Blades made from unbreakable forged and hardened steel.

Technical Details

Product Details

Package Dimensions
Width : 5.6 inch
Height : 0.9 inch
Length : 9.7 inch

Shipping Weight: 2.4 ounce (View shipping rates and policies)

ASIN : B00VDGEU6K