The Abbey Bike Tools Hanger Alignment Gauge Part is a spare feeler gauge to carry with you in case the original gauge is lost or damaged. It's the same part, with no compromise, so you can trust that it will thread smoothly into the handle top and achieve a precise measurement. It will also tuck into the end for storage, just as the original did. Now you'll never lose the use of your HAG and always be able to align 26”, 27.5”/650B and 29”/700 wheels with the greatest of ease.