GRK R4 Multi-Purpose Screws
Non-stripping, self-countersinking screw
I rebuilt my back stairs using pressurized treated lumber. While I was buying the wood at Home Depots I noticed a display of serious looking screws and since I know from experience that fastening wet pressurized 2x12s and 4x4s can be a challenge I thought I would try these. The main selling point was the “Zero Stripping” star drive (aka Torx) head and the “Easy Start” tip. My tool is a Milwaukee 18 volt screwdriver, which performed flawlessly. Though sometimes the screws were a little hard to start, overall they worked well. None of the boards split and there was no stripping. Another interesting feature is what they call “CEE Thread”. This allowed the screw to act like a lag screw. I used the #10 R4 Multi-Purpose Screws, both the 3 1/8” and the 2 ½”. If you have a project that does not require much finesse, these are the screws for you.
09/10/15GRK R4 Multi-Purpose Screws $12 - $15 per 100