Features: Premium alloy steel socket adapters offer superior strength and durability, ensuring long lastingly performances with multiple size option (1/4", 3/8", 1/2") for multifunctional tool compatibility. Precise machined steel construction provide secure fittings between wrenches and socket, featuring a wear resistant finish to minimize slippage during intensive use. Ideal for DIYer enthusiasts and professional mechanics seek reliable, lightweight tool accessories for home garages or industrial workshops. Perfect for car maintenance, machinery repair, and equipment assembly tasks requiring quick size transitioning without compromising torques transmission efficiency. Pocket design with universal brand compatibility simplifies tool organization while maintaining optimally performances in automotive, mechanical, and household applications. Specifications: Surfaces treatments: electrophoresis blackening Product Specifications: 1/2"turn 3/8"--(12.7mm square hole turns 9.53mm square head) 3/8" to 1/4"--(9.53mm square hole to 6.35mm square head) 3/8" to 1/2"-- (9.53mm square hole to 12.7mm square head) 1/4" to 3/8"--(6.35mm square hole to 9.53mm square head) Package Includes: 4pcs Socket Adapter note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you donot mind befores you order. 2.Due to the differences between different monitors, the picture may not reflect the actual color. Thanks for your understandings.