Accu-Tac's steel spikes are the ideal accessory for your bi-pod. They are CNC machined and black oxide treated. The replacement spikes have a simple screw on design for the SR-5 Bi-Pod that allows you to quickly change from rubber feet to steel spikes in seconds and provides aggressive traction on dirt or any soft surfaces. The Accu-Tac steel spikes are the perfect accessory for your bipod. They provide aggressive traction on dirt or any soft surfaces.