
These are well made and fairly close to their nominal size making them easy to use. They are stainless steel but I don't know the exact alloy. They are very, very weakly magnetized and almost completely unresponsive to strong magnets. The steel is quite hard and doesn't scratch or scratch.

Highly π Sought-After Fastener: Connector 014973445713
9 Review

π© 5-Pack of M8x60mm Stainless Steel External Hex Expansion Bolts by Yasorn
10 Review

π© Hard-to-Find Quick Fastener 014973253790 - 4 Piece Set
7 Review

πͺ Strong and Versatile: National Hardware N222 406 Square Bolts for Secure Fastening
7 Review