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 Cable Installation. Also Suitable For Use With Low Voltage Cables Such As CAT3, CAT5, CAT6, and Coax. Each Package Includes 600 Staples.