P&N Drill Step HSS-TIN HEX-SHK Quickbit Carded 4-12MM 8-StepP N 149040120 METRIC Diameters 4, 5, 6, 7, 8, 10, 11, 12mm Steps 8 Shank 1 4" P&N Quickbit Step Drills are ideal for sheet metal without pre drilling. During drilling, the next step deburrs the previously drilled hole. These bits are suitable for use in sheet metal, aluminium, plastic & fibre glass.
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