Chose a location for the gun safe where it will fit and open easily but it is concealed enough to make it less vulnerable to theft. Blocking access to the sides and top of the safe, where the steel structure may be thinner, is also recommended.
Obtain the dimensions of the safe in the manufacturer's specifications or by measuring it with a measuring tape. Use a pencil to draw the dimensions of the bottom and back of your safe onto the floor and wall, respectively, using a yard stick as a guide.
Locate and measure the location of the pre-set drill holes in the bottom and the back of the safe. Mark their exact position onto the floor and wall with a pencil. Line up the back hole locations with a wall stud.
Drill pilot holes into the wall and floor at the marked hole locations. Use a drill equipped with the proper bit for your anchors and the material that you will be drilling into. If the supplied hardware consists of separate anchors and screws, press the anchor portion of them into the pilot holes at this time.
Wheel the safe into position. Use a dolly that is rated to handle a weight greater than your safe's weight, and line up the pre-set drill holes with the pilot holes.
Screw the screws or lag bolts with anchors through the pre-set drill holes into the anchors or wall and floor with a drill equipped with the proper driver.