TEK Discreet Wire connector (DWC) or butt connectors employ a specially designed, wire insulation displacement contact (IDC ) to make a reliable electrical connection to each wire.No stripping of wire insulation required. TEK DWC connectors include a factory-installed sealant ( Jelly filled) to protect against corrosion and moisture resistant. They are also available in a dryflame retardant version for central office and vault. A variety of sizes and wire combinations are available to accommodate almost any need.