The Matco Tools 4-pc 3/8" Drive 12-point 5" Pinless Universal ADV Impact Drive Line Socket Set, No. SBUPDL42VA, is designed to handle hard-to-reach 12-point fasteners, such as those found on driveshafts, cylinder heads, CV's, transmissions, transfer cases, and torque converters. The pinless universal design ensures optimal torque transfer and reliable articulation, allowing for consistent performance. Additionally, the 5" length and 3/8" drive size improve access with impact wrenches, preventing driveline interference. The set includes four popular sizes: 3/8", 1/2", 12mm, and 13mm 12-point socket extensions and a storage case.