Premier Spark Plug Socket 1 / 2″Sq Drive 21mm

• One of a comprehensive range of Premier Hand Tools, suitable for daily professional use.
• Cold-forged Chrome Vanadium steel socket.
• Hardened, tempered and chrome plated.
• Fully polished mirror finish with knurled ring.
• Socket insert grips ceramic insulation and assists in extraction of plug.
• Especially useful on deep-seated plugs.
• Lifetime guarantee*.