De Walt had a great idea when they made the 321. It is handy to have a saw that will take both Bosch and Universial shank blades, that way, you can go into your local hardware store that only sells Black & Decker products and get blades. But they messed up when they designed the blade clamp. If they could fix the clamp, add orbital action, this would be a five star tool. Until then, stay away, very far away, and if you have to use one, wear your safety glasses!