Specifications: The structure is made of heavy-duty heat-treated chromium vanadium steel for superior strength. Features a highly durable black electrophoretic paint finish that provides corrosion resistance and helps prevent rust. Spring-loaded stop ball securely locks the socket in place. Item Name: Wrench Socket Adapter Kit Material: 45# Steel Quantity: 7 Pieces per Set Extension Rod Sizes: 1/2", 3/8", 1/4" Conversion Heads: 1/2" to 3/8", 3/8" to 1/4", 3/8" to 1/2", 1/4" to 3/8" Features: Anti-rust, corrosion resistance, durable Rod Lengths: - 72mm (approximately 2.83") - 64mm (approximately 2.52") - 66mm (approximately 2.60") Notes: Due to differences in lighting and screen settings, the item color may vary slightly from the images. Slight dimensional variations may occur due to manual measurement. Package Includes: - 4 x Conversion Heads - 3 x Extension Rods