Review on 🔪 High-Quality TC4 8 Inch Tile Cutting Carbide 4 Pack for Precise and Efficient Cutting by Rey Hossain

They won't last long. I had to run to my local Lowe's where I bought these 5/16 bits. Broke all four of those 1/8" bits and just cut a hole in the outer 1/4" hard board. Using a 5/16" drill bit, cut eight 4" holes in the ceiling of my patio's solid planks for recessed LED lights. I pre-drilled a 1/2" pilot hole, ran the Rotozip saw blade to full speed, and then started cutting. 1/8" diameter holes broke no matter how fast or slow the drill bit moved before cutting. Never got it to turn or a cut Find and buy 5/16 for a 1/4 inch thick outer hardboard.