JessEm's new 10 Piece insert ring set. The same design as our four-piece set, including JessEm's standard Tab-Lock design, plus a convenient storage caddy that will hold 14 rings in total. If you currently have our 4-piece insert ring set, they will nicely fit into the caddy as well.Features:JessEm standard Tab-Lock design locks into position with a twistInjection molded for precise fit with size markingsFits all JessEm router lifts and router table insert platesSpecifications:Material: Glass Filled PolycarbonateFits the 3-7/8" opening of any JessEm router lift or table, with an easy 1/4 turnSizes: 1/4", 3/8", 1/2", 3/4", 1", 1-1/4", 1-1/2", 1-3/4", 2-1/4" and a blank for making a zero-clearance insertIncluded:(10) Insert Rings(1) Insert ring storage caddy (holds up to 14 rings)