Spark Plug 21mm X 1/2' Drive Crv

Features

• 21 mm socket size — perfectly fits standard 21 mm spark plug hex heads.
• ½″ (12.7 mm) drive square — integrates with standard half-inch ratchets and extensions.
• Chromium-Vanadium (CR-V) steel construction — durable material for long life under service use.

Benefits

• Precision fit: Ensures correct 21 mm plug engagement, reducing risk of rounding plug hex.
• Trade-durable: The CR-V build stands up to repeated use in service workshops.
• Kit-ready: Standard ½″ drive makes it easy to integrate into existing socket sets without needing adaptor.
• Space-efficient: Easy to carry as vehicle service or maintenance tool.

Extra Information

• Use with a short ratchet and extension where engine-bay clearance is tight; the ½″ drive offers good leverage without bulk.
• Keep the socket clean of grit, oil and foil debris from spark-plug removal—this preserves the seat for correct plug and extension fit.
• For corrosion-stuck plugs, break them loose with controlled torque to avoid damaging the hex head or socket — the socket size and fit make this safer.

Specifications

Safety

• Wear eye protection while removing spark plugs—old plugs may break or eject metal fragments.
• Use proper torque when installing new plugs—over-tightening can strip the threads, under-tightening can lead to poor ignition performance.
• Keep the socket properly seated on the plug hex to avoid rounding the plug and damaging the engine head.