If your Senco SLP20XP nail gun isn't firing right, these piston driver assemblies might be the fix. This is a 2-pack of genuine Senco replacement parts (model EA0072). They're designed specifically for the SLP20XP model – double-check your tool to make sure it's compatible. The piston driver is a crucial internal part that drives the nails; over time, it can wear out or get damaged. Replacing it can restore your nailer's performance. Installation requires some disassembly of your tool, so it's best if you're comfortable with repairs or have a manual. Having two means you've got a spare for next time. These are official Senco parts, so you know they'll fit and work correctly. A cost-effective way to extend the life of your nail gun instead of buying a whole new one. Just remember: the tool itself is not included, only the piston drivers.