It's easy to hang frames, artwork or mirrors with the conventional hook, as it comes with a nail inserted at the right angle. You can hammer the nail into place without holding it. Compatible with drywall and plaster wall surfaces, it is reinforced at the elbow for added support. Details: Brass plated Available in 10 lb. to 50 lb. weight capacity Pre-positioned nail For use on drywall or plaster Steel Contents: Hook and nail 10 lb. (4.5 kg) – 6 sets 20 lb. (9 kg) – 6 sets 30 lb. (13.6 kg) – 4 sets 50 lb. (22.6 kg) – 3 sets