Hi there, thats a carb sync tool/wrench, here are some links to similar products : www.partzilla.com/product/honda/07908-4600200?gad=1&gclid=Cj0KCQjwho-lBhC_ARIsAMpgMoed2Xv154os04h03zhIxCIBVrLAWSt8vCnCsRrfrH2SzsVkbTT229saAp9mEALw_wcB and www.common-motor.com/honda-360-carburetor-synchronization-wrench