GEARWRENCH 80546 5/8-Inch x 6-Inch Swivel Spark Plug Socket $10.69

Entry Angle guides fastener
Serration depth as deep as the fastener
Large hard stamped identifications
Swivel Spark Plug
Drive Tang Size : 3/8 inch
https://www.amazon.com/gp/product/B0014ZVSVK