Mountain bikers, this Datanly brake pad set gives you everything you need to keep your Avid Elixir brakes performing perfectly! The 8 pairs of semi-metallic brake pads provide strong, reliable stopping power even in wet conditions, with less noise than sintered metal pads. The copper fiber wire composition offers excellent wear resistance and consistent performance across different temperatures. Compatibility is broad - these work with Avid Elixir E1, E3, E5, E7, E9, ER, CR, XO, XX, DB1, DB3, DB5 models, and even NUTT hydraulic disc brakes. The included installation tools make the job much easier - you get a hydraulic brake piston press tool to reset the pistons, a disc brake gap regulator for proper alignment, and a hex wrench for the installation process. The replacement process is straightforward: remove the old pins and worn pads, insert the new pads with their springs, secure with pins, and check that everything aligns properly without rubbing. Having 8 pairs means you're set for multiple brake services or can share with riding buddies. The braking performance is smooth and predictable, which builds confidence on technical descents. The package feels complete and well-thought-out for DIY maintenance. Whether you're maintaining your own bikes or working on multiple bicycles, this set delivers quality replacement parts at a much better value than buying individual pairs. For serious riders who go through brake pads regularly, this bulk set is definitely the way to go. Reliable stopping power that won't break the bank!