Features: Wrench and taps are made of high quality steel for durability and long service life. Tap wrench is very convenient and practical and it is a necessary tool for tapping. Adjustable chuck easily and firmly clamp the tap. Mainly used for hand tapping operation. This set contains four taps in different size for tapping various threads. It is a great tool set used to create screw threads on wood, plastic, aluminum or many other soft materials. Specifications: Material: Bearing steel Tap Size: M3, M4, M5, M6 Tapping On: Aluminum, wood, plastic and other soft materiel Instruction: 1, Insert cone part first and make sure the tap center line agrees with drilling center line. 2, Rotate tap wrench with a even force to feed tap, don't need to add force after feed. 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. Package includes: 1 x Tap Wrench 4 x Taps Package List 1Wrench and taps are made of high quality steel for durability and long service life 2Tap wrench is very convenient and practical and it is a necessary tool for tapping 3Adjustable chuck easily and firmly clamp the tap. Mainly used for hand tapping operation 4This set contains four taps in different size for tapping various threads 5It is a great tool set used to create screw threads on wood, plastic, aluminum or many other soft materials