1,Easy to use for screw. 2,size 52*50*28.5mm,the material is ABS Screwdriver Magnetizer1,Quickly and easily magnetize small tools so they attract screws or nuts for easily starting and removing. 2,Insert a screwdriver or nutdriver into the hole,pull it out and it's magnetized! Perfect for DIY,mechanics and electricians.3,Size: 52*50*28.5mm4,The material is ABS Screwdriver Magnetizer