Draper expert 12 square drive hi torq spark plug sockets draper expert 34479 expert quality sockets forged from chrome vanadium steel hardened tempered chrome plated and polished for corrosion protection fitted with rubber insert for spark plug insulator protection and retention display packed draper expert hi torq174 is a registered trademark of draper tools ltd draper expert 34479 10mm 12 square drive hi torq spark plug socket