Super strong, tumbled 300 Series Stainless Steel with brass compensated saddle set. Has both string-through-body and top loader holes. The 3 saddle screws are spaced for 2&1/8" spacing. The mounting hole pattern corresponds with that of a vintage style bridge as does the material thickness of the steel. Ships with screws, hex wrench and a pair of shorter height adjustment screws to prevent players from scraping up their palms with certain set-ups.