Security Safes Tool Resistance Table Tools Resistance time within the various categories CAT 1 CAT 2 CAT 2 HD CAT 2ADM CAT 3 CAT 4 CAT 5 Hand tools 15 min 1 hr 1 hr 1 hr 1 hr 1 hr 1 hr Drill 15 min 30min 1 hr 1 hr 1 hr 1 hr 1 hr Angle Grinder 30 min 1 hr 1 hr 1 hr 1 hr Oxy Acetylene 1 hr 1 hr 1 hr Oxy Arc 1 hr 1 hr Diamond Core Drill Thermic Lance 1 hr