The following is a list of Underwriters Laboratories burglary ratings and specifications for safes. This will give you an idea of the type of safe you may require.
Ratings*
Description
Time**
TL-15 The safe must resist common hand tools, picking tools, portable mechanical and electric tools, grinding points, high-speed and carbide drills not exceeding 1/2" (12.7 mm) diameter, and pressure-applying devices or mechanisms. 15 min
Deposit Safe Common hand tools, picking tools, portable mechanical and electric tools, grinding points, high-speed and carbide drills not exceeding 1/2" diameter, pressure-applying devices or mechanisms, and fishing and trapping devices or mechanisms. 15 min
TL-30 Common hand tools, picking tools, portable mechanical and electric tools, grinding points, high-speed and carbide drills not exceeding 1/2" diameter, pressure-applying devices or mechanisms, abrasive cutting wheels, and power saws. 30 min
TL-15X6 Common hand tools, picking tools, portable mechanical and electric tools, grinding points, high-speed and carbide drills not exceeding 1/2" diameter, pressure-applying devices or mechanisms, abrasive cutting wheels, and power saws. 15 min
TL-30X6 Common hand tools, picking tools, portable mechanical and electric tools, grinding points, high-speed and carbide drills not exceeding 1/2" diameter, pressure-applying devices or mechanisms, abrasive cutting wheels, and power saws. 30 min
TRTL-30 Common hand tools, picking tools, portable mechanical and electric tools, grinding points, high-speed and carbide drills not exceeding 1/2" diameter, pressure-applying devices or mechanisms, abrasive cutting wheels, and power saws, and an oxy-fuel gas cutting or welding torch. 30 min
TRTL-15X6 Common hand tools, picking tools, portable mechanical and electric tools, grinding points, high-speed and carbide drills not exceeding 1/2" diameter, pressure-applying devices or mechanisms, abrasive cutting wheels, and power saws, impact tools, and an oxy-fuel gas cutting or welding torch. 15 min
TRTL-30X6 Common hand tools, picking tools, portable mechanical and electric tools, grinding points, high-speed and carbide drills not exceeding 1/2" diameter, pressure-applying devices or mechanisms, abrasive cutting wheels, and power saws, impact tools, and an oxy-fuel gas cutting or welding torch. 30 min
TRTL-60X6 Common hand tools, picking tools, portable mechanical and electric tools, grinding points, high-speed and carbide drills not exceeding 1/2" diameter, pressure-applying devices or mechanisms, abrasive cutting wheels, and power saws, impact tools, and an oxy-fuel gas cutting or welding torch. 60 min
TXTL-60X6 Common hand tools, picking tools, portable mechanical and electric tools, grinding points, high-speed and carbide drills not exceeding 1/2" diameter, pressure-applying devices or mechanisms, abrasive cutting wheels, and power saws, impact tools, and an oxy-fuel gas cutting or welding torch and nitroglycerine or other high explosives 60 min


TL = Tool Resistant,      TR = Torch Resistant,      TX = Explosive Resistant
* X6 denotes the number of sides that must withstand attack.
** Minimum time limit the safe must withstand attack.