You just know this is the look you've been after to add a stunning industrial theme to your project. These faux rivet heads are sized from actual solid steel rivets to give you the most authentic look imaginable- no wood, no plastic, just solid steel that can take a beating as well as any finish desired. I ship them bare so the final topcoat is up to you. The large size has a small dimple in back to help them form. They will typically be deep enough to hide shallow self tapping screws. All sizes are approximate: Small- 11/16. medium 15/16", large- 1 3/16", Extra Large 1 3/4". Also available in 6061 aluminum, please inquire. The rivet heads can be attached via a good construction adhesive or plug welded from the backside of your panel. Custom fasteners are also a possibility (lag, screw or bolt threads) that may be ordered to finish off your project in style... Pan, steeple and pyramid heads by special request.