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

works like a charm

They are the best I have ever used. I used them on a deck they also look great.

Screws do what screws are supposed to do. Hold wood together fine. Really big heads, but not flat underneath so predrilling thin veneer materials is a must. Cons: Did not come with driver bit in either box I bought. No response for over 3 weeks from seller on making that right or not. Now it is past return or claim cutoff. False advertising to say driver included then not provide. ONE star due to the above.

Totally happy with these. Pros: the included spider bit works great driving these fasteners into redwood, pine and cedar. No experience with hardwoods. Depending on the wood itself (adjacent knots, etc), these will counter-sink themselves without stripping, leaving a flush finish. Much nice than the traditional hex-head timber lox. These have a wider diameter head, so they hold very well. Cons: none. Application -- building a pergola from recycled redwood planks.

I have used these screws when making raised garden beds. They work great, and I found the price here on Amazon cheaper than the local big box stores.

Almost a 5 had a couple that had burrs in the heads making them un-usable bad quality control

Nice finish for my jobs.

I first used these a couple of years ago when I made a raised light fixture box in our kitchen. I was honestly stunned by the holding power hey have. The oversized head is great, no need for a washer. I still drill pilot holes because I feel it is better for the wood to reduce splitting. I have just started building folding workbenches for my garage using these to mount the brackets to the wall studs. Again drilling pilot holes these screws dig in and pull in hard. I have to be careful not to let them bend the bracket as they go in with such force.

Was a good option for areas on deck that needed structural support.

These are great lags/screws. I bought another box after using this whole box. They do not strip and hold up very heavy items in my home gym and garage. I definitely recommend these.