Karl, after we talked about different types of fasteners a while back, I de cided to give SPAX a try. You're right... I like them! They are a graded fastener, the have a thinner body than the screws I was using, and they are easier to drive.
However...
I like the Torx drive, but the driver they supply seems soft. The screw hea ds don't seem too deep, so you have to be at 90 degrees to have solid, no s lip drive. I am used to the hundreds of thousands of Phillips and square d rive screws I have driven, and find the fact I have to be right on top of t he screw to drive it annoying as hell. In a tight space with a long extens ion to reach, I can usually drive a Phillips head about 15 degrees of so of f parallel from the head, not so with the SPAX screws and the supplied bit. Since I do a lot of maintenance and repairs, this is pretty important to me.
It was highlighted last week when I had the kick off a long bath vanity tha t was caulked/marble topped/mirrored into place and I couldn't get to the c arcass base runners any other way than laying on my stomach and running my impact driver with a long extension with a screw on it as far back as I cou ld reach. When the screw would bite and find its way into the wood, it wou ld change the drive angle and the bit would slip from the screw. After goo fing with it (laying on my stomach getting my arms torn up by the tack stri p) for about 30 minutes I gave up and got my Phillips screws out and finish ed the job quickly.
This isn't the first time I have had drive problems with the screws, so I a m wondering what the problem might be. When I am over the screw, they driv e very well and their aggressive threads make it quick. I like they fact th at hey are graded for use, and the others I use aren't.
So is it the bit, the screws, or both? Or do I need to confine my use of th ese to more perfect conditions?
Next, how water/moisture resistant are these screws? I am getting ready to install a lot of grab bars in a house, and a few will be in the house bathr ooms. I dont' want to see the bars outside the shower/bath rust, so I am w ary. I would like to have a screw that I didn't have to drill a pilot hole to install, but I would like to have rust resistance even more.
Any thoughts would certainly be appreciated!
Robert