Based on this product's specifications, here are some alternatives and similar models
Centering drill bit set Rittal 4050.815, M8 thread support, for aluminium/plastic/stainless steel/steel, 3 pieces
Summary description:
Rittal 4050.815 centering drill bit set of 3 pieces designed for creating precise pilot holes and centered starts for threading operations. Suitable for aluminium, plastic, stainless steel and steel, the bits support M8 thread size. Ideal for panel work, enclosure fabrication and preparatory drilling before tapping.