Pack of 6-Screw Mandrel-3/32" Diameter Shank-1/16" Screw-Steel

Sold in packs of 6
3/32" Diameter Shank
1/16" Screw
Steel (unplated)
Made in Germany

These 3/32 inch diameter shank mandrels are made of carbon steel and are not plated.  Carbon steel is much stronger than stainless steel so these make for tough mandrels that resist bending and can last a long time.