Where to : our metal magnetizer screw rings are suitable for 1/4 inch in shank electric screwdriver bits,can,and other screwdriver bits,easy and convenient for you to use. Multiple usage: the magnetic screw rings are suitable for many applications,can help you to deal with many work problems,be applied to hinge installation,fixed pendant,furniture assembly,vehicle repair and so on,to make your work more convenient. Package : in this package,you will receive 5 pieces magnetic screw rings,which are practical tools for you to use in your daily life,the sufficient quantity will meet your various work needs and replacement. Functional tool for you: this magnetic screw can catch the screw easily and quickly,and to the drill bit from slipping and improve the work efficiency; Just insert the screwdriver bit into the magnetic,the screw can be easily up. and proper size: these bit magnetizer rings are aluminum alloy,which are,and you can use for a long time; The magnetic rings measure 1 inch/ 25 mm in length,0.59 inch/ 15 mm in outer diameter,and 1/4 inch/ 6.35 mm in inner diameter.