DIN 912 socket head cap screws are high-strength metric fasteners with a cylindrical head and internal hex drive, widely used in engineering, machinery, and precision assemblies for secure, high-torque fastening.
The grey clay cools fast and makes good structure without armature for my projects.
The white softens quicker and is difficult to use for fine detail, same with the plasticene product, I am trying cooking it to see if that makes it more suitable for detail.