30-Degree Working Angle – The joint rotates smoothly and continuously at up to a 30-degree angle, 6-Sided Pinless Joint – Our solid ball-and-socket style joint is stronger than joints that use pins, and the 6-sided ball operates more smoothly than 4-lug designs, Two Size Markings – The size is marked with a high-visibility laser marking and a permanent stamped marking, Works With Friction Ring or Detent Pin Anvils – Smooth walls inside the drive end and a detent pin hole make the sockets compatible with both drive tool anvil types, Socket Organization Rails – The twist-to-lock clips on the rails hold sockets securely and can be repositioned anywhere along the rails.