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.Warnings Always wear approved eye protection. NOT insulated. Will NOT protect against electrical shock. Features T-Handle design delivers more torque to the fasteners Sizes laser etched on blade Convenient hang hole Treated steel for rust and corrosion resistance Chamfered end for ease of use Tip-Ident sizes marked Soft touch grips for maximum control and comfort Blade-through-handle design for high torque applications Size: 4 mm, 6 in. Measurement Standard: Metric Blade Length: 6 in. (15.2 cm) Weight: 0.0060 lbs (2.8 g) Height: 0.5 in. Width: 3 in. Depth: 7 in. Material: Heat-treated steel Style Name: Metric Hex Size: 4 mm Sub Brand: Journeyman Country of Origin: Slovenia DownloadsVideo DownloadSpec Sheet