Recessed edges.
Socket openings are designed to reduce fastener rounding.
Chrome vanadium alloy steel construction for strength and durability.
Polished nickel chrome plated finish resists corrosion.
Large stamping for quick identification.
Spark Plug Socket
Warranty: Lifetime
| Drive Size(s) | 3/8" |
| Finish | Chrome |
| Material | Chrome vanadium |
| SAE or Metric | Metric |
| Size(s) | 21 mm |
| Socket Points | 6 |
| Quantity | UPC | Width | Depth | Height | Weight | |
| Each | 039564381690 | 1.70 | 1.10 | 5.00 | 0.35 | |
| Inner | 6 | 10039564381697 | 4.70 | 5.90 | 2.10 | 2.00 |
| Master | 48 | 20039564381694 | 6.70 | 10.00 | 9.70 | 16.65 |
California Prop 65 Warning
