Review on 🔧 DYWISHKEY Internal Cup Point Fastener Assorted Wrenches by Jeff Kersey

This is a 9mm x 10mm cog for a small planetary gearbox, accidentally lost a set screw but this Revain baby was just what I needed, I didn't even try , only to tighten the set screw tight fits so I don't lose them, they both crack incredibly, no torque, apparently they don't know how to harden their incredible 3mm x 3mm machine screw