The WES5901 offers two bushing sizes in one tool for quick transitions and fewer tool changes. Compatible with WES5501 / 3/8-16 OD and WES5502 / 1/2-13 OD threaded bushings, it’s precise and easy to use. This tight-tolerance adjustable drill bar, also called a “snatch block" or “steam boat", is made in the USA from anodized aluminum. Perfect for hole alignment, reaming, or repair work in aircraft sheet metal or structural components.