4-12/4-20Mm Spiral Flute Step Drill Bit Triangular Shank Step Taper Drill Bit

Features: *Brand new and unused *Made of high-quality materials durable. *Step structure drill bit can have multiple specifications. *Deburring chamfering opening round holes. *Suitable for using to cut holes in a variety of materials including thin steel brass wood plastic etc Specifications: *Product name: Step Drill Bit *Color: silver *Material: HSS *Size: （optional） 4-12mm:(4，6，8，10，12mm) five steps 4-20mm: （4，6，8，10，12，14，16，18，20mm) nine steps *Quantity: 1pc Package Content: 1* Step Drill Bit Note: 1.Transition: 1cm=10mm=0.39inch. 2. The real color of the item may be slightly different from the pictures shown on website caused by many factors such as brightness of your monitor and light brightness. 3. Please allow slight manual measurement deviation for the data.