Oneway Stronghold Chuck #2 Tower Jaws, Serrated are expertly machined to a depth of 1-1/4", providing exceptional gripping power and strength for large bowls and vases. These serrated Tower Jaws increased depth, allowing for more when working on the back of your piece. While they have a narrower range than profiled jaws, they come at a more price. The top of the internal profile features a dovetailed design without serrations, making this part i for non-marking situations, such as when you want to leave the tenon on the bottom of a bowl as a decorative feature. Designed to fit spigots from 2" to 3-3/4" externally and recesses from 2-3/8" to 4" internally, these jaws combine functionality with versatility for your woodworking projects. Model Number: 3599