The MILWAUKEE® 1” Insulated Cable Staples are used for fastening electrical cables to wood surfaces during the electrical rough-in process. Only compatible with MILWAUKEE® M12 Cable Stapler (2448). UL/CUL approved for single or double stacked 14-2, 14-3, 12-2, 12-3, 10-2, 10-3 (single only) NM-B cab