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

Nice finish for my jobs.

I never paid any attention to this product in the past. My son pointed out and I took a chance when I was making some major repairs to my house. I found this product and several variations from Fastenmaster that proved to be great fastening solutions.

Better grip and easier to use in timbers

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

I use it for my deck construction... very easy to drive to fasten the beam..

Joined 4x4s with these. No predrilling needed. Used my Ryobi drill, barely sufficient. Awesome... if only they were cheaper!

Much nicer looking than old-school lag bolts that tend to snap. Made installing a set of exterior steps much easier. Would purchase again

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.

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!

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.