VEVOR Annular Cutter Set, 6 pcs Universal Shank Mag Drill Bits, 1" to 2" Cutting Diameter, 2" Cutting Depth, M2AL High-Speed Steel, with 2 Pilot Pins and Portable Case, for Using with Magnetic Drills
According to the product description, the annular cutters maintain stable cutting performance during high-speed cutting processes, significantly enhancing cutting quality and efficiency.
The product description doesn't mention anything about breaking or chipping. However, it states that the annular cutters are made of M2AL high-speed steel that offers wear and high-temperature resistance.
The product description states that this annular cutter set is compatible with almost all major brands of machinery. However, I would advise you to consult experts to ensure compatibility with your specific magnetic drill.