Premium Spark Plug Socket: 3/8 in. drive 5/8 in. 6-point extra deep spark plug socket for professional and industrial applications6-Point Design: Six-point geometry provides maximum contact with fastener flats, reducing rounding and delivering superior torque transferCR-MO Alloy Steel: Constructed from high-strength chrome molybdenum alloy steel for maximum durability under high-torque impact useHand Tool Compatible: Designed for use with hand-operated ratchets and breaker bars for controlled, precise fastening