AVAK MaxDuty Flex Trio (SAE) Heavy Duty 3-in-1 Tool: Fasten 1/4 rivet, 1/2 rivet nuts and 5/16 rivet stud in one single tool Flexible handle for easy transport and storage without any power loss QuickSwitch: 3 steps for functional dismount or assembly Use both metric/standard fasteners with optional mandrel expansion sets. Packaged in a convenience case.