Later 4.0 Version Arron Kieith, It's not a screw driver it's a 1/4 drv Handle. Has a Square Drive on the end and 1/4 square socket on the. Acts as an extension and make quick work of spinning small bolts out. That is a JBS item, but it looks them same as the Snap-On (I also have the Snap on but the larger Dia handle wasn't suitable for the task)