Features: Set includes: 2pcs 1/4 extensions (3in, 6in); 3pcs 3/8 extensions (3in, 6in 10in); 3pcs 1/2 extensions (3in, 5in, 10in); 4pcs impact socket adapters and 3pcs impact universal joints. Made from premium chrome-vanadium steel, providing high durability for hard and long-term use. Spring loaded detent ball on adapter ends provide secure fit into sockets. Knurled handle allows easy comfortable hand non-slip turning loosened fasteners. Great for working in hard-to-reach areas, suitable for auto shops, garages and project.