PREMIUM QUALITY: The Screw Driver Socket Ratchet Wrench Set is made from high-grade chrome vanadium steel and S2 alloy, known for outstanding strength and long-lasting durability. Its mirror chrome-plated finish not only boosts toughness but also provides superior wear resistance.WHAT'S INCLUDED: This 1/4" drive socket set contains:21 bit sockets: SL4, SL5.5, SL7, PH1, PH2, PH3, PZ1, PZ2, PZ3, H3, H4, H5, H6, H7, H 8, T10, T15, T20, T25, T30, T4013 metric sockets (1/4" drive): 4mm, 4.5mm, 5.5mm, 6mm, 7mm, 8mm, 9mm, 10mm, 11mm, 12mm, 13mm, 14mmAccessories: 1 x 1/4" quick-release ratchet handle, 3x hex wrenches, 1 x 1/4" universal joint, 1 x 2" extension bar,1 x 4" extension bar, 1 x 6" flexible extension, 1 x sliding T-bar, 1 x spinner handle, 1 x bit adapter, and a durable toolboxEASY TO USE: The 1/4" socket wrench set features a quick-release switch and reversible mechanism for effortless operation. The ergonomic, slip-resistant, oil-resistant, and corrosion-resistant handle ensures a comfortable grip. The quick-release button allows easy one-handed attachment and detachment of sockets.VERSATILE APPLICATIONS: Ideal for automotive, motorcycle, bicycle repairs, woodworking, and household maintenance. Perfect for mechanics, handymen, and construction professionals.CONVENIENT STORAGE & PORTABILITY: The rubberized handle enhances grip comfort, while the rugged blow-molded toolbox keeps all pieces organized and easy to transport.Carbon Steel