Constructed of chrome vanadium steel and heat treated for strength and durability.

40-piece tool set includes: 1PC ratchet handle，1PC spark plug socket，1PC extension bar(6")，21PC 3/8" shallow socket in standard(5/16"-7/8") and metric(10mm-19mm) size，16PC 3/8" deep socket in standard(7/16"-3/4") and metric(10mm-19mm) size.

90-tooth Quick-release ratcheting design provides 4°of arc swing, improving mobility in tight workspaces.

Organized in a blow-molded case for convenient storage and easy transportation.

Limited Lifetime Warranty- the product fails to perform due to defects in material or workmanship, you can contact us for a free replacement.