3/8" x 2-1/8" Zinc Concrete Wedge Stud Anchor Bolts WAS-159 (100 pcs)Type: Anchor Bolts
Drill Size: 3/8"
Type: Wedge Anchor
Box of 100.
All mechanical bolts have a wedge arrangement at the end. Tightening the bolt results in a wedge being driven up against a sleeve. This jams the end of the bolt, and provides the strength.