YIKES! I wouldn’t recomend the plier part. Because you could screw up the threads in bolth the yoyo and the axle. I would just recomend screwing it in with your fingers pretty tight. Then it won’t come out unless you screw it out with your fingers. If you use pliers, not only can it screw up the threads, but when you want to get it out you’ll have to use pliers to twist it out, and that is the best way to screw up your axle. Because the pliers will squeeze the threads on the axle, therefore screwing the threads up.