Description:This Fret Rocker can point out those ugly high frets and check the final height after changing or replacing them.4-in-1 mini straightener includes three frets, precision machined to the target, you can mention them to. 0008" per foot, 4", 3", 2" and 1-5/16" make it versatile for any fretted instrument, from basses to guitars to mandolins. Made of 0.11" (2.8mm) stainless steel with a satin finish, for durability in professional use. It is an essential diagnostic tool, before and after partial rerouting and resetting work. This allows you to make a more accurate threshold of operation for better playability. Specification:Material:MetalColor: Rose GoldSize Chart:Size: Approx. 103x52mm/4.06x2.05 inchesPackage Included:1 Piece Rocker ThresholdNote:There may be several deviations due to manual measurement. Thank you for your understanding.