Rocaris 13Pcs 16mm-53mm Stainless Steel Carbide Tip Metal Drill Bit Hole Saw Set ... diameter Size: 16mm, 18mm, 20mm, 22mm, 25mm,26mm,28mm, 30mm, 35mm, 40mm,45mm, 50mm, 53mm.Wood can be drilled about 20mm depth, and 5mm for the stainless steel. ... Bit shattered on first hole I tried to drill in thin sheet metal! Hole saw portion "walks" all ...
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