Klein Tools Folding Hex Key Set -11 Fractional Inch-Sized Keys Pro. The heavy-duty 11-piece set includes a high-leverage 4in long 1/2in key. Industrial strength extended reach blades open independently up to 270 degrees and a precision fit design to reduce slippage and stripping. The durable handle is made of reinforced nylon with a comfortable grip. The heavy-duty Pro Folding Hex Key set is built specifically for a rigorous job site. Specifications for Klein Tools Pro Folding Hex Key Set -11 Fractional Inch-Sized Keys: Manufacturer: Klein Tools Color: Black Features of Klein Tools Pro Folding Hex Key Set -11 Fractional Inch-Sized Keys Pro Folding Hex Key Set with 11 extended-reach blades. Key sizes: 1/2 3/8 5/16 1/4 7/32 3/16 5/32 9/64 1/8 7/64 and 3/32in. High-leverage blades open independently up to 270 degrees. Hex-key ends are square-cut for a secure full-depth fit and maximum contact with the socket to prevent slippage and stripping. Conveniently houses the most frequently used hex key sizes in one set. Blades are made of tough heat-treated alloy steel and range from approximately 3.5 to 4. 5ines long. Reinforced nylon handle has a sturdy comfortable grip. Package Contents: Klein Tools Pro Folding Hex Key Set -11 Fractional Inch-Sized Keys 11 Fractional Inch-Sized Keys Klein Tools 70550: Folding Hex Key Set -11 Fractional Inch-Sized Keys Pro