A: If you are reducing by extremely challenging product like metal or ceramic tile along with the recommended velocity is 300 RPM then simply just drill very slowly and gradually. When chopping tough materials gradual speeds will provide you with extra Handle in addition. The TC multigrade hole observed MHS https://devinbqrgv.spintheblog.com/35871988/the-smart-trick-of-hole-saw-supplier-that-nobody-is-discussing