METRIC PLUG TAPS: Engineered for cutting right-hand internal metric threads, these taps are ideal for cutting internal threads in import cars, motorcycles and machinery HEAT-TREATED CARBON STEEL: Provides superior durability and speed ROLLED THREADS: Deliver more accuracy and are cleaner than machined threads RUST AND TARNISH RESISTANT DESIGN: Provides greater durability and accuracy LASER-ETCHED MARKING: Ensures size identification and won't wear off PRECISION MACHINING: Designed to ensure that bolts fit tightly and anchor securely PRECISE FLUTE DESIGN: For fast and easy chip clearance