Description: Drive Size: 1/2'' (12.5mm) Length: Approx. 250mm/10'' Material: Chrome Vanadium Steel Spring loaded ball bearing holds sockets securely. Package Includes: 1 Piece Ratchet Wrench Extension Bar Note: Please allow 0.5-1 inch difference due to manual measurement.(1 inch=2.54cm) Due to the difference between different monitors, the picture may not reflect the actual color of the item. Please understand, Thank you. Please check the size measurement and the picture carefully before making payment