This one is a little weird but if you go to Amazon's tool and hardware page:

http://www.amazon.com/gp/redirect.ht...&creative=9325

they have an ad for 20% off select Delta shopmaster air cleaners, blades, drill presses, grinders and more tools (right side middle of the page). When you click on the "more" link it lists most of the Delta tools they sell. If you click on the "Here's How" link on the tools and harware page it says that you won't see the discount when you check out but when they process the order.

Anybody try this to see if they honor the discount?