I recently purchased a 6 pack of the Oregon 148-005 Lawn Mower Blades, from SLE. These blades were to replace my OEM Blades which the lawn mower manufacturer told me they make themselves. I compared these blades side-by-side with the OEM Blades and they are the same. I've installed the first set of three and so far mowed my lawn and a neighbors (about 8 hours) and the grass looks as good as when done with the OEM Blades.The edges of the blades are fine, only showing my usual wear for the hours and terrain and they are still straight. The price and shipping was very economical too. I appreciate that. Would order again and recommend.