Capt. Ed Berger from the TackleDirect pro staff discusses the features and benefits of the Korkers spikes and how to replace them on your Korkers boots in the TackleDirect Flagship Retail Store in Egg Harbor Twp., NJ. The spikes on the bottom of Korkers boots are designed to help with traction. They grab on to mossy rocks and other slippery surfaces. The high carbide tip on these spikes provides even more traction. They usually are 7mm in length and come with 40 in a pack. They are easy to install onto your Korkers boots. Great for any fishing occasion.