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.

• Allows easy access, even in restricted or hard-to-reach areas
• Long side for accessing hard-to-reach places
• Short side for higher torque situations and low clearances
• Ball end works on angles up to 25-degrees

• Hex Size: 5/16''
• Short Arm Length: 1.563'' (39.7 mm)
• Long Arm Length: 6.313'' (160.4 mm)
• Weight: 0.17 lb (0.08 kg)
• UPC: 092644330285

(1) Klein BL20 5/16 in. Hex Key with L-Style Ball End