Brackets in kitchen cupboards are used to secure them to a wall. If the cupboard is loose on the wall, the brackets may need to be replaced in order to resecure the cupboard. Metal brackets are typically used to secure the cupboard to the wall. You can fix the brackets on a cupboard that has been mounted on a wall or a base unit that is mounted on the floor.
Open the doors to the cupboard and examine the brackets that are used to secure the cabinet to the wall. If the brackets are loose or the screws are not secured into a stud, new brackets will be needed.
Locate a stud in a wall with the stud finder outside the cabinet; if you use it inside the cabinet, it will not note the studs. Mark the location of the stud on the inside of the cupboard with the pencil.
Place a 3 x 3 inch angle bracket, on the stud, at the top of the cabinet. Mark the location of the screw holes with the pencil.
Pre-drill holes for the screws on the marks you made in Step 3 with the power drill.
Secure the bracket to the wall with screws using the power drill.
Secure the bracket to the cupboard. Place screws into the screw holes on the other end of the bracket. Drive the screws into the top of the cupboard with the power drill.