RYOBI introduces the 3.5" 2-Piece Sponge Kit to our cleaning category. The sponge attachments are ideal for cleaning stove tops, granite, metal, and other cleaning surfaces. The 3.5" diameter gives users the agility to clean hard to reach areas. The 3.5" Hook and Loop backer (sold separately) provides quick change adaptability for a variety of cleaning heads.. The 3.5 in. Hook and Loop System works with RYOBI Hex Shank Compatible Scrubbers and Tools. Included in this set are (2) 3.5" Sponge Heads. 3.5" Hook and Loop Backer sold separately.