Superior Bassworks GripMax strings are a completely new concept in the world of double bass. Your top and bottom hands perform two totally different tasks when playing your instrument. Why should the playing areas be identical? This unique design has a super smooth area covering the top section of the fingerboard allowing for fast and pain free switching of notes with virtually NO unwanted "string noise" caused by the friction of sliding your fingers. The bottom area of the strings have a light to medium-soft texture that has been "spiral cut" into the string. This slight texture facilitates better gripping of the strings for lightning fast pizzicato playing, and drag triplets with with almost no effort. The strings "grab" the air and force it to move, producing more mid and low end tone when playing acoustically. All of our string sets come as a 6 string “bump” assortment (2 sizes of "E", 2 sizes of "G") for 1/2, 3/4, and 4/4 size double bass. The idea is that some players prefer thinner, lower tension strings while others prefer thicker, higher tension stings. Why not offer a wide array of thickness and tension all in one package of strings? This is exactly what we do! Our string sets also include rubber dipped metal ends. NO KNOTS to come untied in the middle of your set! We are proud to be the only company offering this configuration. You need strings that sound great when played acoustic or amplified, strings that wont tear your fingers up if you need to play 3 sets in one night, strings that stay in tune in hot/cold/humid/dry climates. You need Superior Bassworks Kevlar cored nylon strings for double bass. Perfect for Rockabilly, Psychobilly, Bluegrass, Country/Western, and much much more! Stock color GripMax strings are available in Jet Black and Dirty Gut. Custom colors are available upon request for an additional cost. This listing is for Dirty Gut color GripMax strings.