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M35 COBALT HSS DRILL BIT SET SIZE INCLUDED: 29pcs Drill Bit Set:1/16" 5/64" 3/32" 7/64" 1/8" 9/64" 5/32" 11/64" 3/16" 13/64" 7/32" 15/64" 1/4" 17/64 9/32" 19/64" 5/16" 21/64" 11/32" 23/64" 3/8" 25/64" 13/32" 27/64" 7/16" 29/64" 15/32" 31/64" 1/2" PRODUCT FEATURE: M35 COBALT HSS Material 135 Degree Angle Point Straight Round Shank APPLICATION: M35 cobalt hss drill bit set are especially good at cutting hard metals such as stainless steel, cast iron, superalloy, titanium alloy, hard plastic and wood. It can also be used in soft materials. PRECAUTIONS: Make sure to put on masks and gloves before drilling. Keep cool or discontinuous use will largely prolong drill life. Keep the drill bits vertical to the object when drilling Be sure to make both bit and work piece stable. Tilted bit is prone to break Please contact us at the first time if you have any question about our product , we are happy to help you.☺