The iFixit Mahi 1/4" Bit Driver is a handle for driving 1/4" screwdriver bits, useful for repair and other screw-turning tasks that use this bit size.
Its aluminum handle measures 15.5 cm. A magnetic bit socket holds the bit for quick changes, while the knurled grip helps apply torque. The swivel top lets you turn screws with a smooth hand movement.
This is the driver handle listed as iFixit part IF145-439-1. iFixit also includes it in the Mahi Precision Bit Set and Manta Precision Bit Set.