The first time I tried to find them at HF I could not find them..and the clerk said they did not carry 45 blades..Then I found out they are called carpet blades..went back and bought 10 packages..on sale for $1.49 and had a 20%off besides..they have worked great for me..finished cutting a bag full of flannel besides a few quilts..with one blade..think I may change it soon..