0.3mm thick disc steel
Round Disc Steel Strikers

0.3mm Thick Magnet Strikers Round Disc Steel Plates 1000-Count

Price range: $6.99 through $46.99
0.5mm thick disc steel
0.5mm Thick Magnet Strikers Round Blank Metal Disc Steel Strike Plates (500 Pack)

0.5mm Thick Magnet Strikers Round Blank Metal Disc Steel Strike Plates (500 Pack)

Price range: $7.99 through $58.99
1mm thick disc steel
1mm Thick Magnet Strikers Round Metal Disc Steel Strike Plates (500 Pack)

1mm Thick Magnet Strikers Round Metal Disc Steel Strike Plates (500 Pack)

Price range: $8.99 through $112.99