A set of pre-drilled steel quadrants onto which self-made wooden jaws of your own design can be mounted using wood screws. Large wooden jaws can be used for re-chucking a bowl when removing a dovetailed recess or spigot, or for producing a variety of 'jam' chuck-type holding devices. We recommend steps in 12mm increments when producing your own wooden jaws. The optional long chuck key is recommended for these jaws. Suitable for 100mm and 114mm chucks only. N.B. The finish may be either silver or black due to changes in legislation regarding passive zinc plating.-bg