<b>Product features:</b><br> âSquared handles, which makes it easy to tell 1/4 turn increments on the mixture settings. 1/4 turn is typically the increments you want when trying to tune a carburetor.<br> âAdvanced heat treatment process and corrosion-resistant finish screwdriver bits are made to last with performance in strength and durability for your long time use.<br> âUpgraded from previous 7-teeth to current 21-teeth<br> âMarked with tool type on the handle, easy to recognize.<br> <br> <b>Must have for 2 Cycle engines to keep them in good performance:</b><br> â Can be used on ZAMA, Ruixing, Huayi, Husqvarna, Poulan, Weedeater, Sears, Craftsman<br> â string trimmer, chainsaw, leaf blower, hedge trimmer, edger, pole pruner and other machines that utilizes the carburetor adjustment tool.<br> <br> <b>Carburetor adjustment tool size:</b><br> â handle length 3-inch, metal pole length 3-1/8-inch, head I.D. 5/32", head O.D. 7/32"<br>