This 4-string bass bridge is designed as a replacement for early Fender basses and maintains the vintage appearance and characteristics you require for your instrument. It features the string-through location at the back of the mounting plate only (top loader) with knurled saddles, a stamped steel baseplate and mounts with the 5 screws provided. This bridge is NOT designed for string through-body basses. The saddle heights are adjusted with a small flat-head screw driver and intonation screws are phillips head or flat-head adjustable. Its lightweight design and quality plating help keep the weight of your instrument down and provide a vintage airy tone with classic appearance Important Specs and Dimensions:Bridge Plate Dimensi>Overall String Spacing = 2 1/4 in. (57mm)Plate Thickness = 5/64 in. (2.2mm)Individual Saddle Width = 3/4 in. (19mm)Secured to body with 5 screw holes - (70mm between to outer holes, 17.5mm between adjacent holes)Baseplate Material = Steel Saddle Material = Zinc alloy