This nicely crafted Double Bass Ebony String Winder is a must for changing bass strings, saving time and eliminating hand fatigue. Instead of laboriously hand turning the tuning mechanisms when restringing your Double Bass, this convenient and compact string winder is the perfect solution. This durable ebony winder easily slips over the tuning machine-peg. The other end is easily turned until the old string can is removed and the new string can be installed. Fast and easy!