Simpson 1/4 x 2-1/2 Strong-Drive SDS Heavy-Duty Connector Screw SDS25212 Router Bits nails or (6) #9 x

nails or (6) #9 x 1-1/2 in

The chamfered top is specifically designed to prevent mushrooming during installation

and it also provides a flexible seal in non-leaking cracks

6-lobe screws with black-painted heads

Toughened Steel Construction: Built from toughened steel specifically selected for demolition and heavy-duty chiseling applications

Simpson 1/4 x 2-1/2 Strong-Drive SDS Heavy-Duty Connector Screw SDS25212 Router Bits nails or (6) #9 xThe Simpson Strong Drive SDS Heavy Duty Connector Screw (1 4 in. x 2 1 2 in.) by Simpson Strong Tie is a high strength structural fastener engineered for demanding connector installations, wood to wood connections, and engineered wood applications. Featuring a hex head drive, serrated threads, and a corrosion resistant double barrier coating, this structural screw delivers reliable performance without the need for predrilling saving time on the job