These screw rings can magnetize screwdriver, bits, easily and quickly catch the screw and fix, reduce abrasion and improve work efficiency You only need to insert the screwdriver bit into the Rings, the screw can be easily pick up This screwdriver Rings can be apply for hinges installation, furniture assembly, vehicle repair and so on, making your work more The Magnetizers is suitable for 1 / 4inch electric screwdriver bits, also can be suitable for slotted and other screwdriver bits Driver bits Magnetizers is selected from, which are strong, light and portable, which can be apply for long time, Manufacturer: TFAOYS