Hillman 122367 Self-Drilling Brass Wall Dogs with Picture Hanging Hook, up to 50 lbs Self-Drilling Brass Wall Dogs with Picture Hanging Hook Holds up to 50lbs Great for hanging pictures and mirrors Wall-Dogs are great for drilling into plaster, wood, and drywall, and 25 inch metal stud Tip* For lighter applications such as brick, block and concrete a 3/16 pilot is needed