Moroso 62160 spark plug indexer is desinged for both flat and taper seat 14mm spark plugs. The hex head design allows it to be held in a vise. Marking provides a reference for checking other plugs to be used in the same cylinder. High compression race engines require "indexing" of spark plugs to prevent contact bewteen the piston dome and the ground wire of the spark plugs. Once a given plug is selected (placed in a cylinder head and found to have the correct ground wire position), it is placed in the Moroso plug indexer and the position of the ground electrode is marked on the black anodized surface. Moroso 62160 spark plug indexer Moroso 62160 Order quickly and easily over the internet on our secure YAHOO! system 24 hours per day or talk to a real, live sales person at 419-331-2470 during our business hours. WE TAKE ORDERS to CANADA. For ordering information, click on "Orders to Canada" at the top left side of this page. LOW COST SHIPPING! Just $12.95 to ship your entire order by U.P.S. ground within the continental United States. Purchase any quantity of items and you pay just $12.95 to have it shipped! The more you order, the more you save! Orders to Hawaii, Puerto Rico, Virgin Islands, and some parts of Alaska will have shipping added due to having to be shipped by air freight. Customers from these states will be emailed the shipping costs for approval before we ship the order. We use Postal Priority for APO and FPO addresses only. Additional shipping charges may apply to APO or FPO addresses. Payment Methods: CREDIT cards or DEBIT cards VISA, MASTERCARD, DISCOVER, AMERICAN EXPRESS, MONEY ORDERS.