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.
3in1 Planet Waves Guitar String Winder Cutter Guitar Bass Maintenance Tool Black
3in1 Planet Waves Guitar String Winder Cutter Guitar Bass Maintenance Tool Black Price: $2.89
Black Guitar String Winder Head Peg Puller Electric Drill Bass Repair Tool
Black Guitar String Winder Head Peg Puller Electric Drill Bass Repair Tool Price: $3.14
Guitar Bass Peg String Winder Head Tools Bridges Puller Drill Hexagonal Rem LF
Guitar Bass Peg String Winder Head Tools Bridges Puller Drill Hexagonal Rem LF Price: $4.02
Planet Waves DP0002B Pro-Winder Bass String Winder Cutter For Bass Guitar, New!
Planet Waves DP0002B Pro-Winder Bass String Winder Cutter For Bass Guitar,  New! Price: $10.99
Acoustic and Electric Guitar Bass Peg String Winder with Bridge Pin Puller Black
Acoustic and Electric Guitar Bass Peg String Winder with Bridge Pin Puller Black Price: $7.77