The 2.5mm hex wrench I received is too large for my screws’ sockets. I’ve verified the size of the wrench to be 2.49mm across each pair of facets. The screws I received are around 2.125mm across their socket’s facets. You can tighten them with the 2mm wrench, but you must be careful not to round the wrench or screws.
If you have a heated bed, just lay the almost-tightened heatsink and heatbreak on the bed at around 50°C until it’s very warm to the touch, then finger tighten and allow to cool.
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