12 pcs/set4 pairs of brake pads4 metal locking, 4 metal chip equipped 12 pcs/set4 pairs of brake pads4 metal locking, 4 metal chip equipped 12 pcs/set4 pairs of brake pads4 metal locking, 4 metal chip equipped Product description +High-quality materials: Our semi-metallic copper brake pads with more than 30% copper fiber. Is quiet and offers better heat dissipation and better abrasion resistance +Excellent braking power: Bicycle brake pads provide flexible and powerful braking on flat roads and high-speed roads +Safe and reliable: Even if the brakes are continuously applied at high temperatures, the brake pads on the bicycle are not easily twisted or deformed, and maximum performance and durability in dry or wet environments Compatible with many models: +These disc brake pads are suitable for various braking systems: Shimano M315, M355, M515, M515-LA-M, M525. Nexave C501, C601, M375, M395, M415, M416, M446, M465, M475, M485, M486 etc ++++The package includes: a set of 4 pairs of semi-metallic copper bicycle brake pads (each pair is equipped with 2 brake pads, 1 metal lock, 1 metal chip), suitable for quick replacement and have a longer service life ECARETA 4 pairs of disc brake pads, they are much more efficient and responsive when braking