Check the listing for details. ER11 Collet Adapter with collets for M12 polishersander. Color: Multicolor, Condition: New, Made in Unknown. Listed at 28.51 USD. About this item This is a threaded adapter to fit the M12 Polisher / sander. The adapter has m9x0.75 threads on one end and has an ER11 collet cavity on the other. Included is one ER11a collet nut, one each 1/8" and 1/4" collets.This adapter allows installation of any 1/4" or 1/8" shaft rotary tool accessories. I have found this very handy using a wire wheel. Please read this carefully: This listing is for the threaded adapter, one collet nut, one 1/8" collet and one 1/4" collet only. This does not include the M12 polisher, the grinding stone, wire wheel and Milwaukee polisher are not included and are for illustration purposes only. Note that when assembling, the 1/8“ and 1/4” collets will first snap into the nut, as the nut slot is off-center, as shown in the main photo.