StewMac Fret Scale Rules, Set of 3 - Megean

Determine fret spacings and layout fretboards accurately." Before working on any vintage guitar, I always check fret accuracy with these rules." Dan Erlewine - Our accurate, high quality 22 inch x 1-1/4 inch x .030 inch rules, crafted of durable stainless steel for years of service in professional repair shops. Each rule has four different fret scales, and features precisely etched, easy-to-read markings on both sides. Gibson guitar rule24.562 inch Gibson (24-9/16 inch)24.625 inch Gibson (24-5/8 inch)24.750 inch Gibson (24-3/4 inch)25.300 inch Gibson long - This rule includes Gibson's long scale and three shorter Gibson scales. The three shorter scales are different lengths, but over the years Gibson has referred to all of them as 24-3/4 inch. - Fender / PRS / classical rule25.5 inch Fender25 inch PRS / Dobro / National / Benedetto650mm classical660mm classical - Martin / mandolin / banjo rule24.900 inch Martin short25.340 inch Martin long*13-7/8 inch mandolin26-3/16 inch banjo*Martin long scale: The scale used on Martin Dreadnoughts is commonly referred to as 25.4 inch but is actually 25.34 inch.