Step 1: Shopping List
Peg board magnets that I found in the tool organization section at home depot ( i used four per crate, but three would probably work)
M6-1.0 x 10mm hex bolts, M6 lock washers, and 1/4" x 1 1/4" fender washers from home depot (I used this hardware because the bolts matched the threads in the magnets I bought.)
Step 2: Attach magnets to corners of crate
If you use the same magnets that I did, be careful not to over tighten or cross thread the bolts, because the magnets come with soft plastic threads.