FOR WOOD, PLASTIC AND THIN ALUMINUM: The tap drill bit design can drill, tap, deburr and countersink wood, plastic, thin aluminum, copper and other soft metals (5-6mm), not suitable for hard materials. Note: If the drill bit cannot be cooled when drilling, the drilling speed cannot be too high, and the drill bit also cannot be drilled too frequently. IMPROVE WORK EFFICIENCY: Taps can be used for drilling, tapping, deburring, countersinking, etc. at the same time, saving processing steps and time costs and improving work efficiency. The tap adopts a spiral groove design, which has better chip removal effect. These taps are used in tapping machines and are generally more accurate because human error is eliminated. HIGH HARDNESS: These taps are made of high speed steel with a nitrided surface for high hardness and rust resistance. These high speed steel bits and inserts are excellent tools for threading, cutting or forming corresponding female parts. 6 SIZES: There are 6 different sizes