Home \ Products \ Earth Auger Accessories and Parts \ Earth Auger Adapters Earth Auger Adapters Made to Fit and Built to Last Premier Attachments offers a full line of earth auger adapters in today’s most popular sizes and configurations, including:2" Round2-9/16" Round2" Hex2-1/2" Hex2-5/8" Hex3" Hex4" Square If you don’t see the exact adapter you need, no problem — we can design and engineer a custom solution to match your machine and application. All of our adapters are Made in the USA and stocked at our Indiana facility for fast delivery and dependable quality. Each adapter features pin-on connectivity for easy assembly — no welds to crack or fail. The pin-together design ensures that components run true and straight, while the replaceable shaft extends the life of your investment. For added durability, we use AZ tool steel for the retaining pin, giving you unmatched strength and long-term performance.