Sinyeenglon Cobalt Drill Bit Set for Hardened Metal and Stainless Steel, 21Pcs M35 High Speed Steel Twist Jobber Drill Bits 1/16"-3/8", with Metal Index Storage Box
COBAlLT M35 DRILL BIT: Upgraded M35 Cobalt jobber length bits designed for durability, high heat resistance and Hardened surface for stainless steel, cast iron, titanium, aluminum and metal.
SHARP AND DURABLE: Provide M35 HSS with 5% cobalt, which increases wear resistance and durability, harder than 4241 HSS Titanium Coated used in other similar drill bits set
TWIST DESIGN AND PERFORMANCE: Precise 135° Split Point, gold oxide finish and round straight shanks. Prevent walking, clear chips and particles faster.Produced by precision fully ground which ensures chips move smoothly
USE NOTICES: drill bit should be Vertical to the workpiece when used; Controling Low Speed from 200 to 1000 RPM; Using cutting fluid will Stay cool to make the bit last longer.
Various SiZES: 21 sets of drill bits include 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 and 3/8 inch, can meet more needs
