Specifications: Small Tough Case System Kit Connectable case allows you to connect and secure multiple kits. TSTAK compatible allows you to store all your accessory kits in one place TSTAK compatible via cart and large Tough Case. High-speed steel - wear resistance and longer life Toughcore - tapered central core increases stability and durability, and improves fracture resistance. Quick tip - quick drilling start, precise centering and guidance. No wandering, even on curved surfaces. Anti-slip shank - three flat sides eliminate slipping in the tool holder. Modular, small and durable box that can be connected to other components. Designed for safe accessory storage. Transparent lid for easy bit identification. Easy bit removal and replacement. Tool bits are securely held in place. Use the connection system to connect the cases together and securely stack them in a medium ToughCase™ case. Or place them in the optional trolley for a TSTAK-compatible connection. 14-piece Metal Drilling Set, Black and Gold ** Images are for illustration purposes only.