"19mm length allows for work in close quarters","Can be driven by wrench or socket wrench","TiN coated","Most compact bit and socket on the market","Can be used for standard applications","Hard coating increases tool life and helps protect the tool from rust","Intended for hand use only, do not use with impact wrenches or other power equipment 1/4" X 12MM HEX 1 PIECE SOCKET A1PXY12MA | Matco Tools