The Klein Metric Color-Coded Hollow-Shaft Heavy-Duty Nut Driver, 13 mm (65413M) is a hand tool designed for driving 13 mm hex nuts and bolts, including nuts run onto threaded rod. It has a standard 13 mm six-point hex socket and a teal color-coded handle.

The shaft is hollow from tip to handle, so the driver never bottoms out on the end of a rod. A cold-forged steel wrench-assist hex on the shaft lets you add torque with a wrench on stubborn fasteners, and the six-point hex socket maximizes contact with the fastener to reduce the risk of stripping.

The shaft is 5-1/8 in. (130 mm) long and the driver is 10-3/4 in. (274 mm) overall. The Cushion-Grip handle is cellulose acetate, 1-1/4 in. (32 mm) in diameter, and the whole driver weighs 5 oz (142 g). It is not insulated and does not protect against electrical shock. Always wear approved eye protection.

A Nut Driver That Never Bottoms Out

The Klein 65413M is a straightforward 13 mm nut driver built for long threaded rod and tough fasteners.

• Who it's for: Anyone running metric nuts onto threaded rod or working with 13 mm hex hardware.
• Why it stands out: Full pass-through shaft plus a wrench-assist hex for extra torque.
• Worth knowing: It is not insulated and has no magnet. Klein also makes a magnetic version (65413MAGM).