Tekton 3-8 in Drive Flex Impact Socket Set, Metric, SAE, 21 pcs SID97004

Tekton Universal Joint 6-Point Impact Sockets have a compact design for tight spaces. The joint of the socket rotates smoothly and continuously at up to a 30-degree angle. Our solid ball-and-socket style joint is stronger than joints that use pins. The 6-sided ball operates more smoothly than 4-lug designs. The socket base is made from 4140 chromium-molybdenum steel, and the ball/socket piece is made from 8660 nickel-chromium-molybdenum steel. Both pieces have a corrosion- manganese phosphate coating. The socket comes pre-lubricated with SuperLube Multi-Purpose Synthetic Grease (NLGI 2) with Syncolon (PTFE). Maintain the lubrication using this grease or a comparable grease as needed to reduce wear over time. The 6-point socket opening provides an exact fit and maximum contact for hex fasteners. Radiused corners prevent fastener round-off by applying force to a fastener's flat sides, rather than its corners. The socket size is marked in two ways on every socketboth as a high-visibility marking and a permanent stamped marking. Smooth walls and a detent pin hole allow the socket to work with both friction ring and detent pin anvils. 30-Degree Working Angle – The joint rotates smoothly and continuously at up to a 30-degree angle6-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 designsTwo Size Markings – The size is marked with a high-visibility marking and a permanent stamped markingWorks 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 typesCorrosion- – The socket is coated with a manganese phosphate finish to resist corrosion9-pc. Universal Joint Impact Sockets: 5/16, 11/32, 3/8, 7/16, 1/2, 9/16, 5/8, 11/16, 3/4 in.12-pc. Universal Joint Impact Sockets: 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19-mm