Magnetic Pin Dish, 430 Stainless Steel Bowl Tray with Magnet, for Storaging Pin, Needles, Steel BlueSize: about 107.5mm in diameter, 27mm thick, 99mm inner diameter.â Usage: This magnetic pins needles holder is used to store pins, needle or other small metal accessories easily â Easy To Use: Just place your metal pins on the needle holder. The strong magnetic power will help you hold your pins tightly; even if you turn over the holder, pins still keep in its place, not fallling off.