You won't appreciate the strength of this essentially hidden joint until you make your own. Our Lock Miter router bits (and our set-up blocks) create strong, accurate miter joints for a wide variety of applications! Use Infinity premium-quality Lock Miter router bits to cut super-strong miter joints on kitchen cabinetry, drawers, four sided planters, boxes, shadowboxes, and much more. Like all of our Infinity Tools brand router bits, these cutters are made from premium raw materials and are manufactured to exacting standards of quality. With optimal shear angle and extra-thick micrograin carbide tips, they leave a prefect joint and a glass-smooth finish. Our router bits are proven to be of the highest quality and these Lock Miter router bits are guaranteed to give you a perfect factory fit and a flawless finish. Our Lock Miter Jr. router bit (55-502) is designed to work with stock from 3/8" to 3/4" thick. Comes with our custom router bit storage box.