China HSS Step Drills with Spiral Flute

HSS Step Drill Bits
Spiral Flute Step Drill Bit, Step Drills (Straight Flute), Step Drills Set. Such as: 3pcs Setp drills, packing with metal box, wooden box, double blister
Step Drill Bits are perfect for drilling multiple-size holes in thin sections of metal, plastic and wood using a single bit. Each step drills does the work of many drill-bit sizes. Drills round holes in most metals (steel, brass, aluminum, copper) up to 1/8" (3.2mm) thick as well as in plastic and wood. No center punching or pilot hole drilling is required on most sizes. The bits are easy to keep sharp, and the hole size is easily determined by the diameter markings that are permanently laser-etched in the flute areas.
Art No.Size Range stepsShank Size306010013/16"-1/2"6step1/4"306010021/8"-1/2"13step1/4"306010031/4"-3/4"9step3/8"306010043/16"-7/8"12step3/8"306010057/16"-11/8"12step3/8"306010061/4"-11/2"11step1/2"306010071/2"-1"9step3/8"306010089/16"-1"8step3/8"306010093/4"-13/8"11step1/2"306010403/8"-1/2"2step1/4" with 3 flats306010417/8"1step3/8" with 3 flats306010427/8"-11/8"2step3/8" with 3 flats
Art No.SizeStepsShank Size306010114 - 12mm5 step6mm/6.5mm306010124 - 12mm9 step6mm/6.5mm306010134 - 20mm9 step8mm306010144 - 22mm10 step8mm306010154 - 30mm14 step10mm306010164 - 39mm14 step10mm306010175 - 35mm13 step13mm306010186 - 18mm7 step10mm306010196 - 20mm8 step10mm306010206 - 24mm10 step10mm306010216 - 32mm8 step10mm3060102214 - 24mm6 step13mm3060102314 - 25mm7 step13mm3060102420 - 34mm8 step13mm3060102510 - 20mm11 step10mm3060102620 - 30mm11 step13mm306010275 - 28.3mm10 step10mm306010286 - 30mm13 step10mm306010296 - 38mm12 step10mm306010306 - 26.75mm7 step10mm306010316 - 39mm12 step10mm306010326 - 37mm12 step10mm306010336 - 32mm9 step10mm306010346 - 40mm16 step13mm306010354 - 32mm15 step10mm
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