0.315" x 6-1/4" Strong-Drive SDHR Combo-Head Screw - Zinc, Pkg 25 Balusters the Dagger‑Guard finish improves corrosion

the Dagger‑Guard finish improves corrosion resistance

Whether used in new construction

or mounting fixtures to masonry

the HL angle accommodates a range of load requirements and project needs

the PHSD screw installs fast and holds tight

0.315" x 6-1/4" Strong-Drive SDHR Combo-Head Screw - Zinc, Pkg 25 Balusters the Dagger‑Guard finish improves corrosionThe Simpson Strong Tie Strong Drive SDHR Combo Head Screw is made for serious wood projects like cross laminated timber (CLT), mass timber, and other big framing jobs. The unique combo head design gives you flexibility, with a choice to drive it with either a hex bit or a T40 6 lobe bit. A knurled shank helps lock the screw in place, and the sharp Type 17 point starts fast, reduces driving torque, and often eliminates the need for predrilling.