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 three sets of brake pads, as pictured This is enough to replace the pads on the front and rear calipers Made in China These sintered metal brake pads fit the following models 2006 Suzuki Quadracer 450 LT-R450 2007 Suzuki Quadracer 450 LT-R450 2008 Suzuki Quadracer 450 LT-R450 2009 Suzuki Quadracer 450 LT-R450