Review on Kwokker Tungsten Triangle Professional Concrete Product by Stanley Molden

I first tried the SKIL masonry bits I bought at Lowe's only to find they drilled out about 1/8 inch before they stopped digging in. So I returned the useless SKIL bits and tried these. Day and night are different. These bits bite into stone tiles like they're supposed to, and fast. However, be aware that they will create small cracks around the hole, so if you don't want this to happen, watch YouTube or leave it to a pro. I used these to install a paper holder that covers cracks so it wasn't a problem. Even though they are made in China they are good quality and effective so I gave it 5 stars.