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2021/06/02
Bit Hardness Varies | Choose the Right One for the Mountain
Hello, everyone. This is Enta. This is a bit for a down-the-hole hammer. It’s a bit with a drilling diameter of about 110 mm, and I’ve used it to drill about 60 holes since it was brand new. And this is what it looks like now, lol. Here’s a side view. The main body is already worn down. I wonder if the cutting edges are worn out…



