Faithfull ratcheting tap wrench precisely constructed with an ergonomically designed sliding 'T' handle for fitting into tight spaces with ease. The ratchet can be set for right or left hand operations or fixed in the neutral position. The Faithfull FAITWRM4M10S tap wrench ratchet set comes complete with interchangeable chucks and tommy bars with the following specifications: Tap size capacity: M4 - M10. Small chuck capacity: M4 - M6. Large chuck capacity: M6 - M10. 180mm tommy bar. 100mm tommy bar.