11/16" x 5/16" Shank |Mag-Bit 770.1116| Electrician’s Power Bits | 3 Piece size-4 Use Zinc plated self-drilling screws

Use Zinc plated self-drilling screws for attaching strapping or furring channel to steel joists

Engineered to perform under the toughest operating environments

NAS 907B 135-degree split point drills on contact eliminating walking along with requiring less force or push

the standard profile flap disc construction

11/16" x 5/16" Shank |Mag-Bit 770.1116| Electrician’s Power Bits | 3 Piece size-4 Use Zinc plated self-drilling screws8 1 2" OAL x 5 1 2" Twist Length For electricians, pipe fitters and plumbers. Double flute construction Self feeding screw point with spur for clean boring Packed in a reusable storage tube Designed to cut through three 2" x 4"s between other studs with a right angle drill. Traditional double twist for fast clearance of chips and two cutting edges. Single spur for clean cut holes. A self feed screw point for fast, effortless boring.