Had 4 1 1/2" holes to core drill in an 8" foundation wall. Our core drill motor was set at mid speed. Your core drill began slowing about half way though- but made it through just once. The end was worn round and little diamond was left. To complete the job we bought a more extensive core drill form another supplier. The better drill worked nicely and still has diamond. Your drill was not as advertised- Shame on you!
6 years ago
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