13/16" x 5/16" Shank |Mag-Bit 770.1316| Electrician’s Power Bits | 2 Piece length-6-25-6-1-4 The pre-installed screw 3” Hex

The pre-installed screw 3” Hex Head self-drilling screw has a higher pullout value than any spikes

Its cheap in price but not quality

Embedment: 1-1/8

Combination light grinding and cut-off depressed center wheels provide versatility to perform cutting and burr removal or profiling of the work piece with a single wheel

17" OAL x 12" Twist Length

13/16" x 5/16" Shank |Mag-Bit 770.1316| Electrician’s Power Bits | 2 Piece length-6-25-6-1-4 The pre-installed screw 3” Hex8 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.