Diameter of head are 3/8"/ 10mm, length of screw posts are 3/8"/ 9mm;
The package include 12 sets studs screws;
The screws made of zinc alloying, Good toughness,smooth, strong and solid;not deformed during installation not easy to deform or break, allow for a lasting time using;
Very easy to installation,you need to make a hole in the handicrafts with the hole punch,insert a stud screw into the hole, and then you just need to tighten the screw on the base;the rivets nails Chicago stud screws can be easily installed and removed;
Perfect for DIY Leather craft, decorate your bags,handbag,puese, belts, leather bracelets, shoes, boots, handbags, hats and more.