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.Model Fit: Accu-Tac SR5/BR-4Type: Bi-Pod FeetModel Or Style: SpikesColor: Black OxideSize: CompactMaterial: Aluminum