Rotation precision Accurate control of torque for fine adjustment of string tension, with a wooden handle that provides a secure grip during all setup steps. Stable tuning Integrated peg calibration system adjusts tension as you wind, reducing post-wind retuning and delivering reliable, precise guitar string tuning. Broad compatibility Designed for classical and steel-string guitars; adapts to a wide range of peg sizes and layouts; supports diverse string changes with consistent, efficient, and user friendly operation. Precise control Ergonomic design ensures even winding, improves efficiency of string changes, makes secure attachment easy, and minimizes the risk of string breakage for smooth guitar maintenance. Use scenarios - Re-stringing a classical guitar with nylon strings to achieve even winding and stable tuning. - Replacing strings on a steel-string guitar with varying peg configurations to reduce slips and save time. - Performing quick repairs or setups on different guitar models with multiple peg layouts for reliable, user friendly operation.