Description: Features: brand new and high quality Mini magnetizer ring. Put the screwdriver bit into the hole to make magnetic for stronger. The magnetizer demagnetizer ring enhances the magnetic strength for the electric screwdriver bit which has lost its magnetism. An economic, simple way to equip the ring around the bit to grab hold of screws. Specification: Material: Alloy Steel Optional Size: 1#, 2#, 3# 1# 4x17.2mm(0.16x0.68in)(inside diameter x outside diameter) 2# 5x17.5mm(0.20x0.69in)(inside diameter x outside diameter) 3# 6x18.5mm(0.24x0.73in)(inside diameter x outside diameter) Color: Orange Quantity: 1 set(5pcs) Note: Transition: 1cm=10mm=0.39inch No retail package. Please allow 1-3mm error due to manual measurement. pls make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you! Package includes: 5 pcs x Magnetizer Ring(other accessories demo in the picture is not included.)