Quick, Spot on bridge saddle adjustment.

9 very accurate radiused arc bottom and top designed to fit easily under the strings.

Use the bottom curvature to read your fretboard radius and/or the matching top can also be used for string saddle setting height for your choice of playability.

The set of 9 gauges includes:

7-1/4", 9-1/2", 10", 12", 14", 15", 16", 17" and 20" radii.

Fits all 6-string guitars and most 4-string basses—spans a string spread up to 2-5/8" (66.68mm).

Made of Stainless steel.