Cord Lock - Cord adjuster with 2 holes

Cord Lock (2 cm Diameter)

Designed for adjusting and locking cords with a thickness of up to 0.8 mm, this cord lock is perfect for securing your gear. It features a 4 mm diameter spring mechanism to ensure a firm hold.

Ideal for backpacks, jackets, and other applications where you need to tighten cords with ease and reliability.

You could use the 4x20 spring from Bambustore. or recycle from any spring loaded pens.