Clips can add a layer of security while handling and shipping paint style metal cans. The clips are applied in 3 easy steps. Step 1: Place the hook of the clip under the rim of the can. Step 2: Roll the clip over and into the V of the lid. Step 3: Press down firmly until it snaps tightly into position. Available here in three sizes to fit the 1/2 pint, pint, quart, and gallon paint style metal cans.