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来自MSN1 个月
Our Favorite Drill Bit Sharpener Provided Near-Perfect Results in Our Tests
BEST OVERALL: Drill Doctor 750X Drill Bit Sharpener ... but not for bits that require a shallower angle for drilling hardened steel and other tough materials. Bench grinders find plenty of use ...
We Repeatedly Drilled into Three Types of Metal to Find the Best Cobalt Drill Bits
This guide will help you find the best cobalt drill bits for turning metal into Swiss cheese. BEST OVERALL: DeWalt Industrial ...