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(tapping chuck) is divided into two types: torsion wire tapping collet and rigid tap collet: also known as quick-change tap collet (floating tap collet), a torsion wire tapping collet Gu's name, when the rotary force by the reaction force is tapping material is too large (overload protection), will spin protection the tap is not reaction to break, and thus guaranteed by tapping products, mould, material will not be because of broken wire tapping and vexed brain, or scrapped products, mould. Ensure the machining success rate, reduce the cost of increasing the profits of enterprises; Taiwan production of tap collet) is divided into three types according to the size and tapping capacity range: M2~M14, M14~M24, M24~M36; a torsion wire tapping collet, rigid tap collet divided into: Sundial (JIS), (ISO), GB German standard (DIN), the general is using JIS and ISO for more. Where in order to tap collet (tap holder), must be used to determine their own companies tap what standard tap, well matched the corresponding tap collet, if do not know what is the use of the tap, please measure the wire tapping shank diameter and handle size, corresponding parameter table to determine the specifications. Quick-change tap collet used for automobile mould, aviation, engine mold, precision mold, ship industry, military industry, and the torque telescopic screw tap handle, pneumatic tapping machine, electric tapping machine use.