100% Metal Application: Bed Frame Conversion Brackets is perfect for attaching a newer metal bed frame to an older headboard that requires a hook or claw style attachment. It is Convert the bolts on the metal bed frame to the hooks on the metal bed frame Adjustable Height: Offset mounting design of bracket allows a wide range of headboard widths to fit your frame. it has two slots that are approximately 3.22" long. These slots provide for vertical adjustment as well More Stable: 25% THICKER STEEL than other brands，0.25mm thick for more headboard stability Rust Protection: Hooks are made of heavy-duty steel with a protective yellow zinc coating, can resist rust and corrosion Measure：Each modification plate dimensions Height: 7-1/4", Width: 2", Depth of Hooks: 1.07", slots long: 3 -1/4", Overall Bracket Depth: 1-3/4.Fits for bed frames with a depth of less than or equal to 1.07 inches, and the spacing between the upper hole positions is less than or equal to 0.58“, and the spacing between the lower hole positions is less than or equal to 0.77” 100% Metal Application: Bed Frame Conversion Brackets is perfect for attaching a newer metal bed frame to an older headboard that requires a hook or claw style attachment. It is Convert the bolts on the metal bed frame to the hooks on the metal bed frame Adjustable Height: Offset mounting design of bracket allows a wide range of headboard widths to fit your frame. it has two slots that are approximately 3.22" long. These slots provide for vertical adjustment as well More Stable: 25% THICKER STEEL than other brands, 0.25mm thick for more headboard stability Rust Protection: Hooks are made of heavy-duty steel with a protective yellow zinc coating, can resist rust and corrosion