This perfectly holds specifically the Real Avid AR-15 Bolt Catch Punch Set. I used 9mm neodymium magnets with epoxy to secure the punches. Each punch is about 130mm long.
Magnets - https://www.amazon.com/gp/product/B0BFF15N8G/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&th=1
The author marked this model as their own original creation.