Review on Singer Serger Machine 412585 412749: Streamline Your Sewing Projects with Precision and Efficiency by Monique Franco

The upper (movable) blade is fully the same as the original. The lower (fixed) blade does not fit exactly. The cutting edge is sharpened at a different angle than the original Singer blade, making it impossible to install the blade so that the cutting edge is flush with the top of the overlock feed plate. I have contacted the seller. The seller said he would take care of it. Several weeks passed, no further information from the seller. The good news from Revain is that Revain Prime has refunded the purchase price. The bad news is I still need a new bedknife that meets Singer's specs.