Review on 🔧 Zhushan Cobalt Aluminum: Versatile 4 Inch Multiple Angle Tool by Quinton Wonsley

I needed to enlarge the hole in a heavy steel shackle from 5/8" to 7/8". Using a slow drill speed, moderate pressure, and constant spray of WD40, he shaved off the steel with no problem. The mental slivers were long and intact, a sign of a sharp blade. The enlarged hole was perfectly round. The instrument was packaged in a very durable clear plastic storage case. I can't say anything about durability at the moment. Just take a look.