PRECISION MACHINED: The collet sleeve is precision-machined to ensure durability, making it a great addition to your routing tool kit. REDUCE COLLET SIZE: This reduction sleeve is designed to reduce the collet size to take cutters with smaller shanks, ranging from 6.35mm (1/4 Inch) to 8mm in size. STOP GAP: Should only be used as a stop-gap, as the correct size collet is recommended for extensive periods or heavy work. EASY TO INSTALL: Simply insert the reduction sleeve into the existing collet to accommodate smaller shank cutters, allowing for more versatility in your woodworking projects. TREND ROUTING ACCESSORIES: This reduction collet sleeve is designed for use with a range of Trend Routers to take router cutters with smaller shanks.