Self Aligning Tap & Drill Set, National Coarse, #10 x 24

#10 x 24, national course, self aligning tap & drill set, performance threading system self aligns tap in pre drilled hole especially in irregular surfaces or through holes, carbon steel, ideal for routine maintenance, repair work & for rethreading, straight flutes are ground to provide rapid chip removal for efficient threading, designed for hand threading work in a variety of materials, includes #25 drill bit.