I bought these and some stainless steel washers to install a 1/2 x 1/2 mesh in a chicken bed. I'm in my 50's and have put 300 of these on the property (finished wood) with my son's care and help. I used a cordless screwdriver. These screws work perfectly. Not a single screw was broken. They come in easy, like a cake. You're going to need a good beat. I ordered 10 more boxes to complete the project. Stainless steel was VERY expensive but should last a long time. I HIGHLY RECOMMEND THIS.