Planet Waves PWCP13 Capo

The PWCP13 Artist Capo is designed specifically for classical guitars and instruments with flat (non-radiused) fretboards. The Artist Classical Capo utilizes a trigger geometry reducing the force required to open and close the capo while applying even tension regardless of neck profile. The capo combines a micrometre tension adjustment and direct horizontal pressure to reduce the need to retune during use. It includes a micrometre tuner mounting bracket, allowing you to add tuning capabilities to the capo. Tuner sold separately.

https://www.oosthavens.co.za/product-category/guitars/guitar-accessories/