16170 Type 500 HSS Taper Shank (Shank Smaller than Regular) Black Oxide Drill Bit 3.75" OD Bear-N-Bronz® is Boston Gear’s general

Bear-N-Bronz® is Boston Gear’s general purpose

Bost-Bronz® has a self-contained oil supply (approximately 20% by volume) which provides a uniform protective film over the entire bearing surface

Click here for spec sheet: NAT Spec Sheet

Ball Swivel and the popular Six Ball Coupler on a Reusable Strain Relief

16170 Type 500 HSS Taper Shank (Shank Smaller than Regular) Black Oxide Drill Bit 3.75" OD Bear-N-Bronz® is Boston Gear’s generalTaper shank drills are made to fit tapered holders. They are designed to perform well under a variety of normal conditions in a wide range of materials. Packaged individually. Click Here for product catalog Proudly Manufactured in the U. S. A