Alright, for anyone doing auto body work - these self-piercing rivets are absolute game changers, especially if you're working with aluminum panels. This 100-pack of 5.3mm x 7.0mm SPR rivets is perfect for bonding aluminum and steel, which makes them ideal for collision repairs on pretty much every major brand - Ford, BMW, GM, Audi, Jaguar, Land Rover, Mercedes Benz, you name it. The compatibility is impressive too - they work with most standard SPR guns like Car-O-Liner, Chief, Cebora, Pro-Spot, GYS, Spanesi, and plenty of others (just a heads up - they don't work with ribbon-feed rivet guns though). These are boron steel construction, so they're tough enough to pierce through materials without pre-drilling, which saves you a ton of time on jobs. They're a cost-effective alternative to OEM rivets while maintaining that quality you need for professional repairs. The 5.3mm diameter with 7.0mm length is one of the most commonly used sizes, and having 100 in a box means you can tackle multiple jobs without running out mid-repair. Always check your vehicle manufacturer's requirements for rivet size and placement, but these will handle most applications beautifully. Seriously, if you're doing modern collision repair with mixed materials, these should be in your toolkit.