I’m really liking this tool. My fingers are too big to comfortably hold stems by the cross while lubing or doing other things with them. This tool holds the stem very securely, and it’s easy to turn around in your fingers to access different sides. I find it easier to deal with than tweezers if I need to hold the part for a while not just momentarily (for example if lubing). Works for stabilizer inserts too. It’s also handy for grabbing the little M2 screws if they fall down into the keyboard while you’re building. It’s a handy all-around tool but I especially like it for holding stems and stab inserts!
I got mine here: