Adds length to your K-Drill Ice Auger System. In conditions of thick ice, be sure to clear the hole of of ice several times to assure excess ice shavings do not build-up in the hole which will bind the auger and make it hard to lift out once the hole is complete. Extension helps when cutting through thick ice (beyond 3 foot) or when you need extra length when drilling in a permanent fish house or when you just don't want to bend over so for when drilling through thick ice. Easy to install with an Allen Wrench