Chipboard screws are screws with spaced threads and an extra sharp point. They are to be used in dense wood, especially man-made types such as chipboard and particle board. Specifications:? DIN7505 (Form A, Form B, Form C), UNI7910 Head style: flat countersunk, pan, raised countersunk and other styles? Drive type: Phillips, Pozi, Torx and other types Piont type: Sharp point, Type 17 Size: 3.0-6.0mm, 6#-10#, 6G-10G Length:10mm-100mm, 1/2"-4" (production capacity: max diameter=13mm, max length=450mm) Material: low carbon steel, Stainless steel? Property: heat treated, conforming to related standard and customer spec Finish: zinc plated + Wax, Ruspert