1/4 x 2 Mushroom Spike Zinc Plated (100)

3/8 x 12 ITM SDS Plus eVolution™ Hammer Drill Bit

having multi-cutting edges and chip cavities

10 x 3 Simpson Bugle-Head Self-Drilling Screw - Square Drive 410 SS - Carton (1500)

Proof load strength is 175

12 x 2 1/2 Simpson Flat-Head Self-Drilling Screw w/ Wings - Square Drive 410 SS - Carton (1000) 2-4 1/2 Socket Cap Screws Alloy 1/4 x 2 Mushroom Spike12 x 2 1 2 Simpson Flat Head Self Drilling Screw w Wings Square Drive 410 SS Carton (1000) . Fasten wood, plywood and fiber cement to heavier steel up to . 209" thick #3 square drive Machine screw thread, threaded full length 2 1 2" length for 2 x 4 wood header; 2" length for 1" and 3 4" boards Flat countersunk head with self countersinking nibs Shank slot enhances thread formation in steel and removes exhaust Wings above drill point provide clearance