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 Set-Includes two-prong bases and compressors. Fastener Subtype: Two-Piece Two-Prong Set; Fastener Capacity: 2"; Fastener Sheet Capacity: 200 Sheets; Center To Center: 2.75".