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

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

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!

Worked great!

Better grip and easier to use in timbers

I used these screws to layer 4x4 landscape timbers. They drill in easily using a lightweight cordless drill. No pre-drilling required. No splitting (I avoided the last 3 in inches on either end). And they hold strong. Very impressed, easy to used, and easier/cheaper than using lanscape spikes or 60d nails, etc.

Weve used a lot of different fasteners to hold deck framing together, and these are hands down the best so far. We drill a pilot slightly smaller and the same depth as the the smooth shank, then drive them with a cordless impact gun until they are flush. They are great a pulling and holding slightly warped framing lumber into line.

Great fastener, now if theyd just make the drivers a bit more sturdy...

i use these screws for fastening kitchen islands to the floor,ive been using these screws for this for sometime,pretty much since they came out with them,they are perfect and amazing this is the first time having bought them online,,, i now find myself trying to figure out how to kick myself in the butt for not buying them here before ive been purchasing them at one of the 2 popular hardware/lumber chains since using them and it is the exact same product but at a fraction of the cost,,,,cant beat that

Great product, fair price.

I had a couple of diverse uses for these HeadLOK screw. One use was a trim application and the other a stair repair. These screws worked well for both situations. I have a 10 foot x 5/4 x 6 piece of Bubinga transition board between my tile kitchen floor and my carpeted living room. If youre not familiar with Bubinga, the pieces I have are reclaimed 40+ year old wood that is basically Brazilian Walnut, is hard as rock, easy to machine but tough on machine tools due to its high silica content. My problem was that over the 10 foot run, I could not pull the Bubinga close to the floor with standard wood screws because its too thick and the Bubinga was always squeaking and flexing. I tried shims and then floor leveler. Nothing worked. Then I used these HeadLOK lags to pull it down and they worked great. I didnt mind the “steam punk” look of the wide heads on the Bubinga - it looks sort of cool (see photo). I pre-drilled the Bubinga for the HeadLOK lags - I didnt want to split a 40 year old piece of rare hardwood. My other issue was a site built basement staircase. The stair treads were pulling away from the stringers. The HeadLOK lags worked great to pull it all back together. The one thing you need to know is that the Spider Drive bits required to drive these lags cannot be replaced with any other bit on the planet. I literally have 200 odd sized drive bits - Torx, Allen, Torx security, 1-3 square drive, Phillips JIS and every other bit you can think of but without the Spider Drive drive bit, youre unscrewed - you cant drive these bits. That sort of sucks but these bits also drive very securely, better than Torx. I can see what customers complained about the missing drive bit in some reviews because there is no substitute I am aware of - if you know of one, let me know. In the attached photo, you can see the Bubinga trim board with the HeadLOK lags in place, I used a 17mm forstner bit to recess the HeadLOK heads so they are flat to the surface and for the first time in 15+ years, the Bubinga transition board does NOT flex or squeak. Hope that helps!