COMPLETE SPARK PLUG KIT – Includes 5/8″, 9/16″, 14mm, 16mm sockets in 4″, 6″, 10″ lengths plus ratchet handle and spark plug gapper – everything needed for professional spark plug service. SUPERIOR MAGNETIC RETENTION – Features strong magnetic cores that securely hold spark plugs during installation and removal, preventing dropped plugs from damaging engine components in hard-to-reach areas.