Designed to protect your fretboard when polishing your frets, these premium fretboard guards are made using a high precision process that produces a very smooth finish. The high quality stainless steel is nonmagnetic, corrosion resistant and heat resistant. A specially engineered curve contours to all fretboards. The ergonomic handle makes any fret job easier, quicker, and keeps your fingers from getting in the way. Includes 3 GRIP Guards, one each for small, medium and jumbo fret slot sizes. Works with guitar, bass or ukulele.