QST 4Pcs / Set HSS 4241 4-12/20/32mm Nitriding Spiral Flute Step Drill +5 Inch Automatic Center Pin Punch Spring

Description

4Pcs / Set HSS 4241 4-12/20/32mm Nitriding Spiral Flute Step Drill +5 Inch Automatic Center Pin Punch Spring 100% Brand new and high quality Simple and accurate to use knurled handle prevents slipping. Gives precise starting point on steel and other solid materials Allows you to easily mark work using one hand prior to drilling which will prevent the drill from slipping. Automatic spring loads then releases at top of cycle with force to create center punch (No Hammer Needed) Spring pressure can be adjusted by simply rotating the knurled top of the punch. Material: Knurled steel body, Alloy steel point Color: Mainly Gold Total Length: Approx 13cm / 5 inch. Handle Diameter: Approx 1.27cm / 0.5inch. Package included: 1 x automatic centre punch (other accessories are not included) Product Description Style:4-12/20/32mm*3 Condition: New Material: HSS 4241 Material: high speed steel 4241(for the workpiece, used in the following hardness of 28 degrees such as steel, aluminum, carbon steel, sheet iron, insulation board, PVC board, wood, sheet thickness below 3MM) Surface treatment: White Diamond Packing: single plastic sleeve Ideal for using to cut holes in a variety of materials Including steel, brass, wood, plastic, etc. Is_customized:Yes Material:High Speed Steel Use:Wood Drilling DIY Supplies:Woodworking Type:Core Drill Bit