"What can I say I thought I would try these to replace my other mc bits from a well known brand. These easily match their performance if not better them. And for only a fraction of the price. The performance on steel and wood especially surprised me straight through no issues. And as for attaching my bike clamp to driveway floor solid concrete like a knife through butter.
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Review 2 for Erbauer Multipurpose Construction Drill Bit Set 4Pcs