Replacement sub-base plate allows for dust collection using the included fittings Compatible with Bosch Colt 1-hp trim routers (PR20EVS, PR10E) Compatible with Festool D27/32 (27mm) hoses, Bosch VAC005 hoses, and Bosch VAC002 adapter to use 1-1/4" hoses Three fittings are included: one for above the table, one for below the table with maximum capture, and one for below the table that can accomodate larger router bits Manufactured out of a high-density and heat resistant polymer Made in the USA - Charlotte, NC This dust collection sub-base turns the Colt 1-HP Trim Router (PR20EVS and PR10E) into a joy to use instead of a chore of cleaning up after it. The oem fixed base does not have any off the shelf dust collection fittings for above and below the sub-base until now! The dust collection fittings are compatible with the Bosch VAC005 and Festool D27 (27mm) hose coupling.