Klein hex-keys are the tools professionals cannot afford to be without. Heat-treated and tempered for superior strength and durability, Klein hex-keys are designed for a precise fit in sockets, preventing slippage and stripping of the socket.PRODUCT FEATURES:- L-style hex keys in convenient caddy sets - Includes 9 sizes: 1.5, 2, 2.5, 3, 4, 5, 6, 8 and 10 mm - Each set contains a unique locking feature and marked slots for each key - Ball end works on angles up to 25-degrees - Durable caddy keeps hex keys organized - Top-grade alloy steel - Heat-treated and tempered for added strength and durability - Rust and corrosion resistance surfaces - Extra length for hard-to-reach applications