FastenMaster FMHLGM412-50 HeadLOK Heavy-Duty Flathead Fastener, 4-1/2 Inches, 50-Count

I used these to create a frame of 4x4s for a 10 x 20 foot deck. They were very easy to use and the end result is very solid with a professional, finished look.

Awesome for assembling a post and rail fence, work great with a hammer drill.

These screws are fantastic. Im building a pergola and was using 3 1/2 inch Pozidrive screws, and since I didnt have a drill bit long enough to drill a 3 1/2 inch pilot hole, the screws would start camming out and stripping once they went in past a few inches. I picked up these structural screws which use a spider drive. They are flawless. Even at 4 1/2 inches, NO cam out issues, WITHOUT pilot holes. Incredible. And the wide flat head works like a washer. Like the box says, these pretty much can replace 3/8 lag screws + washers. Awesome. Flat black color looks very clean too.

Work as designed. Very durable. Had to take apart the steps I was building a couple of times and the heads did not strip out. Would buy again.

Glad I saw reviews of these screws on some woodworking websites and decided to buy them. I used them to build a large workbench (connecting 4x4s and 2x4s)...much easier than traditional hex-head lag screws or carriage bolts Ive used in the past. Though they say no pilot hole is needed, I found they are so aggressive when being drilled in, they can/will split wood if installed too close to the edge. Pilot holes eliminated that problem. Other than that situation, they really dont need pilot holes. They wide head eliminates the need to use washers, saving time and money, yet allows them to be driven flush or even countersunk. Would happily use them again.

Finally, something to mount a hang board to my wooden studs! Worked brilliantly. Love that they come with a spider driver.

These are really great fasteners! I used them building a pavilion next to my pool and they worked perfectly! I like the star head, never slips. Just wish they werent so darn expensive!

These bolts are easy to install with a impact driver and they hold really well. I have installed 100’s of them and can’t remember stripping stripping the head on a single one. They are expensive though but worth the money if you are building something you want to last. I have even removed them from old structures during renovations and was able to reuse them.

love these screws use them in a lot of projects now

Built some outdoor benches that are going to take a beating. These are torx head screws (my favorite kind of drive) with an oddball size driver. Luckily a quality driver bit is included in the box. These babies bit down and drove home solidly. The larger than normal heads act as a washer to help keep joints tight. If you have a project that is going to take a lot of racking and stress I recommend these.