[150MM & HIGH QUALITY MATERIAL]The drill bits in the pack is 160mm, which are longer and drill deeper than standard ones. Made of High-speed steel, these twist drill bits are durable, and they have high abrasion resistance&long service life. [DOUBLE-GROOVE DRILL&ROUND SHANK]With the double groove chip removal design, these drill bits can speed up the process of drilling and chip removal.And the round shank is suitable for most types of hand drills and impact drills. [EXQUISITE CRAFT]Twist drills are formed after quenching, and they meet the industrial tolerance standards for bore diameters. Each bit meets industrial performance and safety standards. [WIDE APPLICATION]Suitable for various materials, such as die steel, spring steel, white steel, ordinary steel, aluminum, copper, wood, stainless steel(within 1-4mm), plastic and PVC,etc.

DETAILS ABOUT EXTRA LONG DRILL BIT Length of each drill bit:150mm Material: High-speed steel Diameter of twist drill bits:2/3/3.5/4/5mm TIPS Please add some water during the process of drilling, in case of breaking the bits. Please take protective measures during use to avoid accidents. PACKAGE LIST 150mm Extra Long Drill Bits

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