General description A four-piece spark plug socket set featuring a T-bar handle and a universal joint head, designed for the safe and easy removal of spark plugs, especially in confined areas. Technical specifications Socket sizes: 16mm, 18mm, and 21mm Drive size: 3/8" Handle length: 140mm Handle width: 94mm Profile: Single Hex (6pt) Compatibility and accessories Compatible with any 3/8" drive accessories Usage Ideal for spark plug removal in confined areas Rubber inserts protect and retain the spark plug during removal Non-slip T-grip handle provides excellent leverage