Product Package： 1pcs Rivet Adapter 2pcs Wrench 3pcs Rivets 3pcs Convertible Head（If the built-in head is broken, you can change it yourself） 4 pcs Nozzle Technical Data: Nozzle Size: 3/32", 1/8", 5/32" and 3/16" 3/32"*1/4 ,1/8"*3/8",5/32"*1/2" 3/16"*3/4" popular sizes aluminum pop rivet each 10pcs DIY Supplies: woodworking, stainless steel, pipes Type: Brad Nail Gun Power Source: work with the electric drill MAX RPM : 1000 RPM Min Torque Strength: 15 N.m Aluminum: 2.4 mm - 4.8 mm Steel: 2.4 mm-4.0 mm Method of operation: 1. Pick the right size opening for your rivet, there are 4 to choose from. 2. Attach the tool to cordless drill. 3. Hold the tool, before it starts to grab the rivet, hit reverse on your drill until you feel click. The rivet can be fitted in once the teeth widen. Put the rivet in the tool and slowly hold the handy part of the tool and pull the drill trigger, when you feel it start to grab the rivet. 4. put it in the hole that you wish to rivet and keep holding the handy part and hit the drill at full. 5.Once the rivet pops, keep holding the handy part of the tool and hit reverse on your drill. 6. The teeth will widen and the old rivet shaft will drop to the ground. Put your drill back in the forward position and rinse and repeat.