3pcs 4-12/20/32mm HSS Step Drill Bit Set TiAlN Coated Spiral Grooved Hole Cutter

Description Three pieces of metric staircase drill 4 12 4 20 4 32 3pcs 4 12 20 32mm HSS Step Drill Bits Set Spiral Grooved Hole CutterSpecification Type step drillMaterial high speed steelCase size 12 5 9 5 3 5cmSize 1 4 12mm 5 steps 4mm 6mm 8mm 10mm 12mm 2 4 20mm 9 steps 4mm 6mm 8mm 10mm 12mm 14mm 16mm 18mm 20mm 3 4 32mm 15 steps 4mm 6mm 8mm 10mm 12mm 14mm 16mm 18mm 20mm 22m 24mm 26mm 28mm 32mm Features Specifical step design one drill for many sizes very convenient Cutting material iron sheet aluminum insulation board PVC plate wood thickness in 4mm The hole with a drill can play a variety of SELF STARTING No need for a pilot hole Automatically deburrs holes as you drill Long Life True high speed steel Nitriding to make it durable and run cooler Includes protective padded aluminum case Package Included 1x 4 12mm drill1x 4 20mm drill1x 4 32mm drill1x caseMore Details