Reduction sleeve is used to reduce the collet size to take cutters with. Should not be used for extensive periods or heavy work. Manufacturer: Trend. Compatible devices: Lathe, Grinding Machine, Drilling Machine, Milling Machine.
This enables the 1/2" collet on my Trend T10 router to take my 1/4" shaft router bits. The T10 only comes with a 1/2" collet and this sleeve is a much cheaper option than purchasing a 1/4" collet and quicker to use than going through the process of alternating different sized collets. It works perfectly well.