Small Parts 1024KWTF Steel Self-Drilling Screw, Zinc Plated Finish, Wafer Head, Star Drive, #3 Drill Point, #10-16 Thread Size, 1-1/2" Length (Pack of 50)

Worked fine after I predrilled oversize holes in the plywood deck.No breakage. Did have one (out of 21) that did not self tap. I used another screw to drill and tap the hole and replaced it with the dull screw.The waffer head and torx drive were what I wanted for this project.

I use these to hold down the plywood decking on my trailer. I like them because they go And nice and smooth so the head doesn’t stick up

The price was ok and they are strong, but the design doesn’t work for self-tapping wood-on-metal. Tek screws like this, while pricier, have “wings” on the drilling tip (see photos) that break off after drilling through the wood and hit metal, preventing the threads from biting into the wood thus allowing the self-tapping tip to drill freely through the metal you are mounting to. These screws do not. I was able to make these work only by pre-drilling the holes through both the wood and metal, defeating the purpose of self-tapping screws.

When you need a self-tapping screw with a large head on it this is the way to go these work great would buy again

Hex is smaller than I had hoped. Strips easily. Not what I had hoped.

I used these to install new 5/8" marine grade plywood to my snowmobile trailer. It uses a T20 bit. Worked great! My advice, pre-drill the wood only and install.

Absolute junk. I've just gone through 30 screws to achieve 8 fastened points. Self drilling function isn't working in cold rolled steel. Either they just spin or the TORX starts stripping out. Now job is held up.

great screw, used them to re-deck my snowmobile trailer, did a great job