??FITS ALL EXISTING SHOP VACS Our patented design adapters 1-1/4" 1-7/8" 2-1/2" are adaptable to a variety of shop vacuum cleaners from 1 to 20 gallon. 1-1/4" and 1-7/8" adapters are mainly for mini and middle size shop vac from 1-9 gal, but also for some large size vac like as Stanley SL18701P-10A 10 gal and Craftsman CMXEVBE17656 20 gal. 2-1/2" adapter is for large wet/dry vac from 10 to 20 gallon. The three adapters make this tool compatible with all brands' shop vacuums eg. RIDGID, Vacmaster, Dewalt, Armor All, Hart, Krcher | | ??EASY TO INSTALL Our patent design adapters could be connected to both hose cuff extension wand, and turn wet vac to an extractor very quickly. To install is a breeze, save your time. These three adapters are no inside threads, so no need to cut or break hose's cuff for installing. So your hose cuff could still be kept well and could still connect original accessories of your shop vacuum. This hand wand tool is for upholstery cleani.