I bought a number of Derby extra blades on eBay. After a few days I accidentally found out that two of the packs of five Derby blades have only four blades instead of five. I wrote the seller and immediately received refund for these two blades.
Personally I think that it is just manufacturing defect. All the pack of blades were sealed in plastic film. It would be interesting to know if somebody have experienced the same problem with Derby or any other brand.
Personally I think that it is just manufacturing defect. All the pack of blades were sealed in plastic film. It would be interesting to know if somebody have experienced the same problem with Derby or any other brand.