These blades, like many others with these type of tools, are way overpriced, especially at amazon. I like to buy here but this is one item that should be no more than $25, even that is too much. You can find in most B&M home centers , $25 is as an everyday price. The BIM blades are the ones to buy as the bi-metal is much better at cutting over time than the HSS. The Bosch specific blades work much better, as the adapter doe not hold well and will slip over time on other blade manuf. types. Because of the price of blades, many applications are best done with other saws. I suggest you use this type of tool only when you have no other choice for cutting unless you like spending a lot of money on replacement blades.