Title: 16PCS 1/2-Inch Drive SAE Deep Cr-V Impact Socket Set ,Surface Electrophoresis ,Laser Engraving specification Red Blow Mold Case Features: HIGH-QUALITY CR-V STEEL MATERIAL: Forged from heat-treated chrome vanadium steel, the surface is treated by black Electrophoresis finish, corrosion-resistant, wear-resistant, and rust-resistant. LASER ENGRAVING SPECIFICATION:Laser engraving specifications are added to the surface of each sleeve. Users can quickly find the sleeve they want, and it will not wear after long use. COMPLETE 16-PIECE KIT: Including 12PCS5/16" 3/8" 7/16" 1/2" 9/16" 5/8" 11/16" 3/4" 13/16" 7/8" 15/16" 1" sockets to meet the needs of daily maintenance work. Equipped with 3'', 5'', 10'' extension bars for access to deep tapped holes. The adapter allows the sleeve to be used with a 3/8" wrench. 3/8' to 1/2'' SOCKET WRENCH ADAPTER: Engineered for use with 3/8''impact wrench. Its spring-loaded detent ball securely helps latch onto sockets, preventing them from being dropped. CUSTOMIZED STORAGE CASE: Designated slots in the case keep every piece in place, anti-off hole slot, lock force more firmly reduces wear and prevents rounding off at corners. The card slot in the box is printed with a size mark for quick identification. Specification: Material: Cr-V (Chrome vanadium steel) FinishElectrophoresis Quantity: 16PCS Drive Size: 1/2-Inch Drive System: SAE Drive Type: Deep Package Size: 33 * 26.8 * 6cm / 13.0 * 10.6 * 2.4in Package Weight: approx. 4280g / 151oz Packing List: 12 * Sockets5/16" 3/8" 7/16" 1/2" 9/16" 5/8" 11/16" 3/4" 13/16" 7/8" 15/16" 1" 3 * Extension Bars(3", 5", 10") 1 * Adapter 1 * Storage Case