Backing strips are easily removed. Install by removing release coat sheet and pressing against folder or apply through pre-punched slits in folder for extra strength. Permanent adhesive. Complete SetIncludes two-prong bases and compressors. Fastener Subtype: Two-Piece Two-Prong Set; Fastener Capacity Nom: 2in; Fastener Sheet Capacity: 200 Sheets; Center To Center: 2.75in.