To fit lathes with 3/4" x 16tpi spindle thread, this chuck set is ideal for new woodturners, as a spare chuck or for smaller lathes. It is simple to operate & forgiving towards turning tolerances. It everything necessary for a wide range of the most popular applications such as bowls, platters, pepperpots, goblets, pens & many others. The kit contains a 25mm & a 50mm jaw that can contract to grip spigots externally or expand to grip recesses internally; it also contains a stepped jaw for contracting on to the base of different sizes of bowl without crushing the timber & finally a woodscrew insert is included for turning larger bowls & platters.