Kit contains: a spindle extension, three #5 Telescoping Adapters 5/8" Wide, One set #3 Flange Adapter 1" X 1/2", One set #3 Flange Adapter 1" X 5/8", two 2" OD X 1/2" ID Steel Washers, two 2"OD X 5/8" ID Steel Washers, One end cap 1" X 1/2-20 INT. Fits 3M(TM) Rubber Slotted Expanders wheels PN28348 and PN28349. Fits Coated or Surface Conditioning Wheels with 1/2", 5/8 in or 1 in AH.