s: copper fibers and resin provide low noise, improved heat dissipation, and enhanced abrasion resistance. Excellent braking performance: bicycle brake pads deliver responsive and strong braking on flat and high-speed roads. Safe and reliable: brake pads maintain stability and performance under continuous high-temperature use, with minimal deformation. Consistent performance in both dry and wet conditions. Compatible with various models: these disc brake pads fit multiple brake systems including Shimano M315, M355, M515, M515-LA-M, M525, and Nexave C501, C601, M375, M395, M415, M416, M446, M465, M475, M485, M486. Package includes: 4 pairs of semi-metallic copper bicycle brake pads (each pair includes 2 pads, 1 metal lock, 1 metal shim), designed for easy replacement and extended service life. Package Content: 4 pairs brake pads