National Nail 5-Lb. Sterling Fasteners #9 x 2-1/2-Inch Bugle-Head Deck Screws Glass & Tile Bit Set Square "D" Open Tank Float

Square "D" Open Tank Float Switch

the Cobalt bits with RED HELIX provide Rapid Chip Removal limiting heat buildup to Stay Sharper Longer

helix is 31 degree which minimizes the over aggressiveness of a true parabolic flute

SAE standards

National Nail 5-Lb. Sterling Fasteners #9 x 2-1/2-Inch Bugle-Head Deck Screws Glass & Tile Bit Set Square "D" Open Tank FloatMultipurpose deck screws for face fastening wood deck boards and securing other exterior wood to wood connections Type 17 slash point for fast starts and no pre drilling Buglehead draws board tight, finishing flush 2 3 thread design offers premium holding power T 20 and T 25 Star Drive reduces cam outs and eliminates excessive wear on the screw head and bit 1 in. (31. 8mm), 1 in. (41. 3mm), 2 in. (50. 8mm), 2 in. (63. 5mm), 3 in. (76. 2mm), 3 in. (88.