Factory Spec severe duty brake pads are made of a sintered bronze compound. Their exclusive high-density mix extends pad life for use in extreme conditions such as sand, mud, water and farm usage. If long life is your main concern, these brake pads are your best choice. They will last much longer than any semi-metallic or organic brake pad on the market. Manufactured by Factory Spec Included is two sets of brake pads, as pictured This is enough to replace the pads on the front calipers Made in China These sintered metal brake pads fit the following models 1999 Polaris Magnum 500 4x4 2000 Polaris Magnum 500 4x4 2000 Polaris Magnum 500 4x4 HDS 2001 Polaris Magnum 500 4x4 2001 Polaris Magnum 500 4x4 HDS 2002 Polaris Magnum 500 2x4 HDS 2002 Polaris Magnum 500 4x4 2002 Polaris Magnum 500 4x4 RMK 2003 Polaris Magnum 500 4x4 HDS