MalcoHW7X1/2ZT Zip-in Self Piercing Screw, 1,000-Pack

I just completed installing a whole house worth of duct work. I used this entire bucket of 1000 screws. They worked well and grabbed easily. I have seen other Zip screws with a phillips instead of flat head which would have been better but honestly if your using large quantities of these your using a drill driver with a 1/4" hex bit anyway so these work fine. Am happy with the purchase.

Value for the price

All I have is positive coments for great screws.

This is good for the my gutter guard and help me to install easily.

They work great for gutter guards, they do not work good for anything thicker unless you predrill, they were breaking on my enclosed trailer unless I drilled out almost to the exact size of the screw diameter. Not the best choice on thicker material, use something else,

Gotta love ZIP SCREWS, only issue, and it wouldn’t matter who you buy these from, is the heads tend to snap off if you torque them to hard, tip in heavier gauge metal is to reverse and forward if you feel it tighten up on you

I bought these for installing new gutter guards. These worked great. It didn't take much for them to bite and go into the gutter while mounting the guard plates. You need that when on a latter! lol

I used these screws for installing 100’ of gutter guards. They worked well. Self tapping very easily went through the guard and gutters