Utoolmart Twist Drill High Speed Steel Bit, Mini Twist Drill Bits Set, Jobber Small Twist Drill Bits, 4.7mm Twist Drill, HSS-4241 Twist Drill Bit Set, for Steel Aluminum Alloy, 5 Pcs

Utoolmart Twist Drill High Speed Steel Bit Description 1. High-speed steel straight shank drill bits are good for most general purpose applications, offering a combination of hardness and toughness for wear resistance. 2. Premium nitride coating can apply lubricant better for smoother drilling and is durable and corrosion resistant. 3. Reduced shank drills expand the size range capacity of a portable drill chuck. Common flute and overall length for minimal adjustment during tool changes. 4. For use in a wide range of stainless steel, aluminum alloy, iron, copper, brass and metal materials. Perfect tool for maintenance departments, machine shops, and other industries. How to Use Twist Drill Bits * Ensure the left and right cutting edges of the drill are symmetrical when drilling. * Observe the uniformity of the spark while drilling, adjust the pressure in time, and pay attention to the cooling of the bit. Technical Parameters * Bit Diameter: 4.7mm / 0.19-inch * Shank Diameter: 4.7mm / 0.19-inch * Cutting Length: 55mm / 2.17-inch * Total Length: 85mm / 3.35-inch * Material: High Speed Steel (HSS-4241) * Surface Treatment: Grind and Heat Treatment * Color: Silver * HRC: 62-63 * Shank Type: Round Shank Package Content * 5 Pcs x Twist Drill