The Feeler Gauge is used by many luthiers and guitar techs as an accurate tool to measure neck relief, action, pickup heights and nut saddle depths.   Unlike feeler gauges used in the automotive industry, Hellfire gauges are sold "grease and oil free" to prevent transfer to your guitar.  All blades are checked for accuracy.  Comes with a mini setup card.
· Metric Feeler Gauge 0.05mm - 1.00mm - 13 Blades
· Alloy Steel Casing
· Grease and Oil free