Check the listing for details. 16/17/19/21mm Ignition Spark Plug Spanner Dual-Ended Wrench Socket 5Pcs. Condition: New. Listed at 11.75 USD. Wrench ToolWhy Choose This:★Included - 16mm, 17/19mm, 21mm wrench socket and 2 round bar. Please confirm the wrench socket size before ordering.★Comfortable to Use - Ergonomic design, comfortable hand feeling, compact, lightweight and portable.★High Torque - Pass the round bar through the hole to be a T-shape wrench, can apply more leverage and torque.★Corrosion Resistance - Adopts by carbon steel material, surface treatment with galvanized, make it more durable for long service life.★Widely Used - Manual removal of spark plugs, suitable for most common spark plugs, is very convenient in life. Suitable for automobile and bicycle repair industry, mechanical disassembly, faucet nuts, daily maintenance and other purposes.