6pcs For Metal Industry High Speed Steel Hard Milling ter Step Drill Bit Set

Features: High Speed Steel Material: Classic step drill bit constructed of high-speed steel with cobalt coating with high hardness they are practical and durable Wide Application: This set of drill bit can be used for drilling holes in aluminum copper stainless steel and many other types of sheet metal. Also doubles as a hole expander. Drilling Deburr: Flute design deburrs during drilling clearing chips faster and allowing particles to escape for clean holes. Each step drill bit features a tri-flatted shank for a secure fit into power tool chucks eliminating slip. Straight Groove: Double straight grooves make quick drilling and chip removal smooth. The universal triangular handle makes it suitable for all kinds of equipment and is more sturdy. Package Include: Our package come with 3pcs step drill bit and 3pcs drill bit. Enough quantity for you to use Specification Material: High speed steel Color: Gold Step drill bit head length: About 12mm/0.47inch 20mm/0.79inch 32mm/1.26inch Step drill bit shank dia: About 4mm/0.16inch Drill bit shank dia: Abour 3mm/0.12inch 6mm/0.24inch 8mm/0.31inch Tips: Electric drill users note: the 12V electric drill is not recommended because of its insufficient torque. It is recommended to use 36V and 48V electric drills Note to users of electric hand drill: the larger the hole diameter is the lower the speed of electric drill is. It is recommended that the speed be less than 1000RPM Package included: 3pcs x Step Drill Bit 3pcs x Drill Bit Note: Due to the light and screen difference the item s color may be slightly different from the pictures. Please allow 0.5-2cm differences due to manual measurement.