Review on 🔩 MKT Conset Masonry Anchor Fasteners: Optimal Diameter for Screw Connection by Doug Hook

I used these screws to attach the slats to the garage floor. The concrete was 20 years old and hard, and it took several drill bits for the Bosch Bulldog. Check your bits regularly as worn bits make a smaller hole and can lead to screw breakage. Screws work well if the hole is the right size. The bit included with the screws is suitable for some rotary hammers for small jobs in concrete blocks or fresh concrete. I was pleased with this product and will use these screws again.