Robust Metal Construction: Crafted from 45 steel with protective finishing for reinforced durability and oxidation resistance, this wrench set withstands frequent use in automotive repair and industrial environments without deformation or deterioration Stable Grip Mechanism: Specially designed interior surfaces maintain secure with filter casings to reduce slippage, allowing safe removal and installation while protecting both and tools in amateur or professional settings Common 3 / 8 " Drive Compatibility: Designed with standard 10mm square drive that connects seamlessly with ratcheting tools, extensions and handles from typical tool sets, enabling flexible application during oil servicing and mechanical tasks Compact Storage Solution: Includes a sturdy case measuring 16.5x10.5x5cm ( 0.9kg) that keeps all wrenches securely organized in designated slots, perfect for mobile technicians or orderly workshop storage Versatile Size Selection: Features 5 cap styles sockets ( 24mm / 27mm / 32mm / 36mm / 38mm) to fit most vehicle oil, consistent passenger cars, SUVs, trucks and heavy machinery for maintenance requirements, Manufacturer: Tsophreniq