[Durable]: Picture pins are made of metal pin shank and brass pin head, durable and strong. The nail surface is black due to special treatment process, rust and corrosion resistant. [Little Damage]: The hanging nail point is sharp, easy to penetrate into the wall, and less destructive to the wall. If necessary, the wall can be easily repaired (not suitable for hard cement wall, ceramic tile). [Size]: Two sizesLarge35 mm in length, 1.8 mm in diameter of shank, 4 mm in diameter of brass head;Small:25 mm in length,1.4 mm in diameter of shank, 4 mm in diameter of brass head.moderate length, convenient for hanging pictures, photo frames, etc. [Application]: These nail hook pins can be used on wooden beam, wooden wall, drywall for hanging picture, photo frame, clock, wall hanging, etc. The nails can be used directly or with picture hooks. [Easy to Store]: 100 pieces of brass head pins(each size are 50pcs)enough for your daily use, come with a plastic box for easy storage.