Upgrade your Ultimate Leg Extension Attachment with this replacement locking knob. Designed to securely fasten the leg extension attachment to the machine, this knob ensures a stable and safe workout experience. Crafted from durable materials, it withstands the rigors of intense training sessions. Easy to install, this locking knob is an essential replacement part for maintaining the optimal performance of your Bowflex equipment. Keep your fitness routine on track with this reliable and long-lasting component.