High : Super Strong Heat Treated Chrome vanadium steel for Normal & Impact Drivers. Detent ball on each adapter for socket retention.Please kindly notice, when using with socket adapter, Less than 50 Nm. Size: 1/4 inch , 3/8 inch and 1/2 inch drive adapter each with a 1/4 inch hex /driver fits all quick-change drill chucks system as as standard drill chucks. Sockets Snap-On Tightly & 't Slip Off. Application: This adapter set is designed to a securely locked in extension to your existing tool. Provides additional length to reach into a multitude of hard to reach spaces. The spring ball ensures a fit into the driver head to prevent slipping during use. Specifically machined to fit securely into a hand driver, drill driver or impact wrench. Multifunction: Used in the installation of pneumatic screwdriver, electric screwdriver, pneumatic drill, manual screwdriver and other installation for the hexagonal tool .It is a good accessory for conversion. Colourfull design: Different colour coded rings, easy to pick the right one. color: blue +red +yellow Material: Chrome vanadium steel All Sockets Standard 1/4 inch Hex Size: (1/4 inch hex to 1/4 inch socket)Socket Adapter,length about 65mm (1/4 inch hex to 3/8 inchsocket)Socket Adapter,length about 65mm (1/4 inchhex to 1/2 inch socket)Socket Adapter,length about 72mm Contents: 1 X (1/4 inch hex to 1/4 inch socket)Socket Adapter 1 X (1/4 inch hex to 3/8 inch socket)Socket Adapter 1 X(1/4 inch hex to 1/2 inch socket)Socket Adapter Only the above content, other are not included. Note: Light and different displays may the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.