Sonic 22511 Three Eighths Inch Drive Flank Socket 6 Point 11mm

The Sonic 22511 is a 3/8-inch drive flank socket, 6-point, sized for 11 mm fasteners. This Sonic Tools part (22511) is listed in automotive catalogs and toolkit literature, including GM service tool references, confirming its 3/8" drive, 6-point geometry and 11 mm sizing. For exact catalog placement, you’ll find it described as a Flank socket 3/8", 6 pt., 11 mm in Sonic Equipment materials and GM toolkit documents. The 11 mm hex size matches common metric fasteners, making it a dedicated option for metric applications in automotive and light equipment service. Its flank/socket profile is designed to engage fasteners in tighter spaces where standard sockets struggle, and it appears in both individual socket listings and larger Sonic tool sets and combination sets.