Secure lock system with click mechanism so you know the top is closed properly.
Teng Tools 106 Piece 1/4, 3/8 & 1/2 Inch Drive Metric Regular/Shallow & Deep Socket Set - TM106.M T bar adaptor, flex head adaptor Regular sockets - 1/4 inch drive - 6 point - 4, 5, 6, 7, 8, 10, 12, 13mm Deep sockets - 1/4 inch drive - 6 point - 6, 7, 8, 10, 12, 13mm Regular sockets - 3/8 inch drive - 6 point - 8, 9, 10, 12, 13, 14, 15, 16, 17, 18, 19, 21, 22mm Spark plug sockets - 3/8 inch drive - 16, 21mm Regular sockets - 1/2 inch drive - 12 point - 19, 24, 27, 30, 32mm Bits (25mm) - 1/4in.M T bar adaptor, coupler adaptor Accessories - 1/2 inch drive - 2 1 /2in.