Test materials included wood, PVC, and aluminum for titanium-coated high-speed steel bits cast iron, stainless steel, and aluminum for cobalt alloy bits brick, cinder block, and poured concrete for masonry bits and ceramic, travertine, and glass tiles for carbide-tipped tile bits.Īfter noting the physical characteristics of each bit set, I selected four different drill bits from each set. I tested the picks in a workshop using a benchtop drill press with a keyed chuck and a cordless drill driver with a keyless chuck. After reviewing more than 50 drill bit sets, I selected our top picks based on functionality, size combinations, cost, and availability. Then I began searching the most reputable tool brands to find the best drill bit designs and materials available. To kick off this project, I spent 20 hours researching drills and drill bits for common household repairs, maintenance, and DIY projects and learning about best drilling practices. Photo: Mark Wolfe How We Tested the Best Drill Bits
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