When you need to drive screws, bolts and other fasteners into hard-to-reach places, the Westward 38RV72 Drive Guide is the tool for the job. This hex power drive guide has a 1/4" hex shank size and a 3 5/32" overall bit length. The 1/4" drive size allows you to adjust it with your existing power tools. Made of steel, this drive guide has an SAE measurement type and hex fastening tool item. With its durable construction and ease of use, the Westward 38RV72 Drive Guide will make your next project much easier.