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13 PCS Metric M35 Cobalt Steel Twist Drill Bit Set HSS Extremely Heat Resistant with Straight Shank to Cut Through Hard Metals Like A Hot Knife Through Butter,Such as Stainless Steel,Titanium Alloy
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About 13 PCS Metric M35 Cobalt Steel Twist Drill Bit Set
Different types of drill bits are used to cut holes in different types of materials.Drill through metal like a champion! Cobalt drill bits are more expensive than other drill bits, but if you regularly drill through metal, they are a good investment since they tend to last longer. This set of Wrightus M35 cobalt steel drill bits are particularly successful in cutting through hard metals such as stainless steel and cast iron, although they can be used for softer materials, wood, and plastic too. Cobalt drill bits are not made of pure cobalt, but rather a steel alloy with certain percent cobalt. The 5-percent alloy is known as M35 grade. The cobalt increases the strength of the steel and makes it more heat-resistant; this is an important factor in drilling hard materials because the friction of metal against metal can produce high temperatures that damage the material or the drill bit. Tests shows that the M35 cobalt steel drill bits can penetrate a 5mm-thick 304 stainless steel plate in 5 seconds. Notice: The working life of the drill bits can be largely prolonged by using with cooling liquid. Specifications: Material: M35 Cobalt Steel(5% Cobalt and 95% High Speed Steel) Angle Point: 135 Degree Flute Type: spiral Hardness: Rockwell 67 Shank Type: straight shank You will get: 1.5 mm Twist Drill Bit x 1pc 2 mm Twist Drill Bit x 1pc 2.5 mm Twist Drill Bit x 1pc 3 mm Twist Drill Bit x 1pc 3.2 mm Twist Drill Bit x 1pc 3.5mm Twist Drill Bit x 1pc 4 mm Twist Drill Bit x 1pc 4.5 mm Twist Drill Bit x 1pc 4.8 mm Twist Drill Bit x 1pc 5 mm Twist Drill Bit x 1pc 5.5 mm Twist Drill Bit x 1pc 6.5 mm Twist Drill Bit x 1pc 6.5 mm Twist Drill Bit x 1pc Reusable Plastic Case x 1pc No such words as "Cobalt Steel " is printed on the case, but they are.
