Bass string winders. These tools can quickly and easily detune and tighten your bass strings when changing. This can be a surprisingly tedious process and uncomfortable for your hands, and these cheap tools can make the whole thing quite painless- particularly for upright bass.

Planet Waves Ergonomic Bass Guitar String Winder & Stretcher - PWPW1B
	Buy It Now: $5.05
Bass String Winder Cutter- Pro-Winder by Planet Waves
	Buy It Now: $10.50
Dunlop Ergo Bass String Winder 117SI
	Buy It Now: $9.18
Planet Waves Ergonomic Bass Guitar String Winder & Stretcher - PWPW1B
	Buy It Now: $9.04
Planet Waves Pro Bass Guitar String Winder Cutter Tool
	Buy It Now: $6.95