ProPress Tool for Copper Pipe, 18V Brushless Electric Crimping Tool Kit for 1/2, 3/4, 1 Inch Pro Press Fittings with 3 Press Jaws, 2-Pack 2Ah Batteries, Fast Charger, Carrying Case

https://a.co/d/0bkH50nH It's one of those things, for crimping copper fittings for pipes. My job bought us Milwaukees version but you can get by for a fairly basic one, as long as it seals those crimps all the way around, you're good. They're super convenient for a lot of copper piping being done but they seal up super tight and won't break loose unless ya force it loose.