No instructions, dimensions fit 1/2" hole but they are a bit small. To tighten the nut and secure the bolt, you need to grab the threads. If you overtighten, they will start to slip and you won't have a good grip. Buy a big brand and don't use it.
πͺ Strong and Versatile: National Hardware N222 406 Square Bolts for Secure Fastening
7 Review
π© 5-Pack of M8x60mm Stainless Steel External Hex Expansion Bolts by Yasorn
10 Review
Highly π Sought-After Fastener: Connector 014973445713
9 Review
π© Hard-to-Find Quick Fastener 014973253790 - 4 Piece Set
7 Review