High quality: this drill bit extension set is made of industrial grade heavy-duty material, , withstanding high pressure Strong magnetism: locking mechanism and strong built-in magnetism easy to up batch automatically, fast and quick release ensured. Adjustable hex bit holder:the red sleeve can be adjusted and suitable for single !(NOTE:Not suitable for double bits).Great for working with the area hard to reach, quick change will greatly improve work efficiency. Wide applications: our drill bit extender is suitable for nut, batch , pneumatic screwdriver, electric screwdriver, pneumatic drill, manual screwdriver and screwdriver ; Please note that only the bottom of the hole part is magnetic, and the hex shank is not magnetic Size:2.4 inch/ 60 mm, 4 inch/ 100 mm and 6 inch/ 150 mm color:Red+black Material:steel Package Contents: 6 x Black drill bit extenders 6 x Red drill bit extensions Only the above package content, other products are not included. Note: Light and different displays