Sorby Patriot Chuck Jaws, 4-1/4 in. are specifically designed to work seamlessly with the Robert Sorby Patriot Chuck (#26350). These RSJ5 4-1/4" jaws allow the chuck to hold significantly larger recesses or spigots, making them i for turning bowls and platters that measure over 16 inches in diameter. Crafted with precision in England, these jaws a minimum external diameter of 4-1/4" (108mm) and a maximum external diameter of 5-1/4" (133mm). They also accommodate a minimum internal diameter of 3-13/16" (97mm) and a maximum internal diameter of 4-13/16" (122mm), providing versatility and reliability for your woodworking projects. Model Number: LRSJ5