Popular metric sized shallow impact sockets that can swivel 360 Degrees enabling access when working in a confined space. Made from strong chromium-molybdenum (Cr-Mo) steel with a phosphate finish to protect from rust and corrosion. The spring-loaded ball-and-pin swivel design provides a more secure 360 Degree action. Sizes: 13, 14, 15, 17, 18, 19 & 21mm. 1/2" Drive. 360 Degree swivel action for easier access in difficult places. Made from CR-MO for strength. Phosphate finish to protect against corrosion. Spring-loaded ball-and-pin design.