Genuine Tenax locking key designed for tightening and securing Tenax fastening systems quickly and easily. This special fastening key is used to tighten the locking ring/nut when fitting Tenax buttons to material. Essential for secure and professional installation of the Tenax button range. Features: • Genuine Tenax locking key • Designed for use with Tenax fasteners • Easy tightening of locking rings/nuts • Durable and easy to use A must-have tool for fitting and maintaining Tenax fastening systems.