Unique snowflake design hex sockets are used for removing stuck or damaged bolts, nuts and screws. Features a knurled ring for extra grip and SCM435 alloy steel construction. Includes (Qty.) (1) 8mm extractor socket, (1) 10mm extractor socket, (1) 11mm extractor socket, (1) 12mm extractor socket, (1) 13mm extractor socket, (1) 14mm extractor socket, (1) 16mm extractor socket, (1) 17mm extractor socket, (1) 19mm extractor socket. Not for use with air tools.