19/25PCS M42 Cobalt Drill Bits Set for Hardened Metal & Stainless Steel Drilling Bits Power Tools Accessories (Color : A, Size : 19PCS(1-10MM))

Metric length, the best usual purpose length for professionals for tough materials that normal bits cannot workCobalt bits make for some of the cleanest holes and the most durable drill bits, the surest bits for long-life and extended working hours on toughest materialsStraight Shank will fit in any common drill19PCS(1-10mm)1.0/1.5/2.0/2.5/3.0/3.5/4.0/4.5/5.0/5.5/6.0/6.5/7.0/7.5/8.0/8.5/9.0/9.5/10.0mm, a total of 19 drill bits25PCS(1-13mm)1.0/1.5/2.0/2.5/3.0/3.5/4.0/4.5/5.0/5.5/6.0/6.5/7.0/7.5/8.0/8.5/9.0/9.5/10.0/10.5/11.0/11.5/12.0/12.5/13.0mm, a total of 25 drill bitsTwist drill bits are the standard type of bit for modern building construction and are built to be used on, but not limited to, most home fixtures and furnishings.Cobalt is the longest lasting material when it comes to common drill bit materials, not only will the bit's structural integrity withstand tremendous heat and wear, but more importantly Cobalt bits can drill through tougher materials than common bits.Made of High Speed Steel containing cobalt (M42), the cobalt giving an color to the metal, is strong than other bits, meaning that it not only lasts longer but also can work hardened metals and things With a 135 degree split-point, these drill bits will catch on the work-surface with greater ease and not wander all over the surface making scratch-marks. This means that after securing the bit in the machine all that is needed is a steady hand to point and apply pressure, and that's it.The straight shank of our bits means you can use this drill bit with nearly all types of machines.The Metric length is the most commonly used length to diameter standard of drill bit, the length is scaled according to the diameter of the drill head to give maximum force with maximum support so as to keep the bit from bending under the pressure, all the while keeping the machine a comfortable distance from the surface so as not to come in contact and s

• 19PCS(1-10mm) 1.0/1.5/2.0/2.5/3.0/3.5/4.0/4.5/5.0/5.5/6.0/6.5/7.0/7.5/8.0/8.5/9.0/9.5/10.0mm, a total of 19 drill bits; 25PCS(1-13mm) 1.0/1.5/2.0/2.5/3.0/3.5/4.0/4.5/5.0/5.5/6.0/6.5/7.0/7.5/8.0/8.5/9.0/9.5/10.0/10.5/11.0/11.5/12.0/12.5/13.0mm, a total of 25 drill bits
• Twist drill bits are the standard type of bit for modern building construction and are built to be used on, but not limited to, most home fixtures and furnishings.
• Cobalt is the longest lasting material when it comes to common drill bit materials, not only will the bit's structural integrity withstand tremendous heat and wear, but more importantly Cobalt bits can drill through tougher materials than common bits.
• Made of High Speed Steel containing cobalt (M42), the cobalt giving an color to the metal, is strong than other bits, meaning that it not only lasts longer but also can work hardened metals and things
• With a 135 degree split-point, these drill bits will catch on the work-surface with greater ease and not wander all over the surface making scratch-marks. This means that after securing the bit in the machine all that is needed is a steady hand to point and apply pressure, and that's it.