The Accu-Tac steel spikes are the perfect accessory for your bi-pod. They provide aggressive traction on dirt or any soft surfaces. They are CNC machined and black oxide treated. The replacement spikes have a simple screw on design for the LR-10 Bi-Pod that allows you to quickly change from rubber feet to steel spikes in seconds! FeaturesAggressive traction on any soft surfaceQuickly change from rubber to steel spikes in secondsMil-Spec Hard Anodize Type III coated