I just ordered a pkg of 45 mm. they are due to arrive today. will see what they are like. I have not ordered from them before but I found their website here on the board. they have lots of sewing notions etc and are not that high priced. I think a pkg of 10 blades was like 18.90 plus shipping of course. Handy to order on line instead of having to run to the store. I have heard others say they get the ordered thru Harbor Freight and they like them also. I have never dealt with them.