Combining our bestselling 4 x 4 High Performance Ferrules with replacement inner poles, this bundle is designed to make transferring from one terrain to the other simple. So, if you're walking your dog in the mud you can load up your inner pole with your High Performance Ferrule to easily switch in the car and walk safely on mud, sand, snow or ice before switching back when you go home so you don't then run the risk leaving crutch prints of mud, sand, snow or ice inside! This bundle will not only give you comfort, stability and confidence but will also save you 20% too! Please note these are best suited to crutches, if you use a walking stick we recommend using the Ultralite High Performance Ferrule Bundle. When changing your rubber tips, it is key to check the grey plugs in the bottom of your sticks are secure before putting the new ones on. For more information about how to change your rubber tips on crutches and walking sticks please see our How To Videos.