1pc 13-23mm Black Oxide Morse Taper Drill Bit Metric Size Morse Taper Shank Twist Drill Bits for Wood Plastic Metal Drilling,23mm

Specification:Material:HSS 4241(High Speed Steel)Shank Type: Morse Taper MT1 & MT2Standard:DIN345Point Angle:135° Quick-Cut Points(Self-Centering)Surface Treatment: Black OxideSize Chart:As The Picture ShowHardness: HRC.65Note:1.Not for Hardened SteelHSS 4241 grade cobalt drill bits are NOT suitable for hardened steel, high carbon steel and heat-treated steel. Please buy carbide drill bits to drill these materials.(We also have YG6 grade carbide drill bit for sale, please visit our store and order it)2.Cooling Liquid RequiredPlease use with cooling liquid to prolong the working life of the drill bits and to avoid overheating and breakage.

• Drill Bits are constructed by heating HSS bits to 950 degrees Fahrenheit. This creates a black oxide finish that will resist rust and corrosion, and also reduces the friction between the bit and the material, which in turn speeds up the drilling process.
• Black oxide bits are made to last up to 50% longer than standard high-speed steel bits, offering premium durability and speed, and they are considered to be the best general purpose drill bits on the market.
• Straight shank allows for firmly holding and accurate centering, fit for standard drill chucks and regular round collet chucks. Must be used and operated at proper RPMs for maximum efficiency
• Black oxide drill bits are ideal for a multitude of materials including steel, aluminum, copper, brass, PVC, polycarbonate, acrylic, oak, maple, medium density fiberboard, ABS plastic, nylon, and composite materials.
• Only one size drill is included in each selection, please purchase as required.