Check the listing for details. 3-PC Carbide Tipped Brad Point & Hinge Boring Bit Set. Condition: New. Listed at 69.96 USD. 57mm Long • Carbide Tipped Complete hinge installation set for boring machines.Industrial Quality HBM-102 set contains:One 35mm Dia Right Hand Carbide Tipped Hinge Boring Bit Two 8mm Dia x 27mm Cut Height Left Hand Carbide Tipped Brad Point Boring BitsIndustrial Brad Point Boring Bits are Coated with a Non-Stick Coating for Longer Lasting Cutting Edge and Tool Life. Amana Tool® dowel drills are coated with a special Polytetrafluoroethylene (PTFE), a non-stick color coating. In cases where the carbide tip cutting edges are coated, there is no need to sand the coating off before use. Once the tool starts drilling, the coating is cleared off the needed cutting edge right away. Amana's coating is applied onto the bit at a temperature of 570° F. The coating reduces the friction between the chip and the body inside the flute and it helps to clear the chips out of the hole during the drilling creating a cooler drilling area, no burning and longer lasting cutting edge.