You just need to put the wire in between the jaws and close. The round jaw will press the wire into the concave causing a good half circle loop. Concave pliers are also fantastic for wire wrapping jewellery craft. Start off with the appropriate tools for that task and you https://spoilmevintage.co.za/2024/11/20/chain-nose-pliers-uses-unlocking-creative-diy-project-ideas/