Features:Wrench and taps are made of high quality steel for durability and long service life.Tap wrench is very practical and convenient and it is necessary tool for tapping.Adjustable chuck easily and firmly clamps the tap. Mainly used for hand tapping operation.This set contains four different sized taps for tapping various threads.This is a great tool set used for creating screw threads on wood, plastic, aluminum or many other soft materials.Features:Material: Bearing steelFaucet Size: M3, M4, M5, M6Tapping On: aluminum, wood, plastic and other soft materialsInstruction:1, Insert cone part first and make sure the tapcenter line agrees with drilling center line.2, Turn the faucet key with even force to feed the faucet, you don't need to add force after feeding.3, Reverse rotate about 45 each time rotate tap to cut chip in order to avoid blocking.4, If it is difficult to rotate tap, stop adding force or tap will be broken.The package includes:1XTapKey4 X taps