I've been seeing the E-Z Lock attachment for the Dremel for quite a while now, like many of you I am sure. If you haven't seen it, it is a toolless accessory exchange system. Dremel claims on the EZ-Lock starter package that the blades will last twice as long as the regular reinforced blades. I was standing in Lowe's the other day with some extra cash (usually a bad idea), when I read this for the 30th time. This time I decided to see if Dremel was for real. I plunked down the 15 bucks and decided to put their claim to the test.
The tool used is an old Dremel Model 395 MultiPro. The material is a steel side panel from some donor case from who knows where. The regular blades are 1" in diameter, while the EZ lock variety are 1 1/4".
The test is to cut a straight line in the panel until the blade was no longer usable.
The bottom cut was made with the regular reinforced cutting wheel at max speed. It is 12 7/8" long.
The other 3 cuts were made with 1 EZ Lock blade. They total 39 1/4" long.
The conclusion: Dremel EZ Lock reinforced cutting blades are far superior to the regular reinforced blades.
Regular blades go for 6 bucks and change for a 5 pack around here, about 20 bucks for a tube of 20. The EZ Lock starter kit includes the mandrel and 5 blades for $15. You can get a tube of 12 EZ Lock blades from Sears for 10 bucks.
http://www.sears.com/sr/javasr/product.do?cat=Power+Tool+Accessories&pid=00964452 000&vertical=TOOL&subcat=Rotary+Tool&BV_UseBVCooki e=Yes
If you do the math, you'll see that you can't beat the EZ Lock in terms of cutting distance for the buck. Not only that, but the EZ Lock system means I never have to mess with that dinky screw in the regular mandrel again.
If you cut with your Dremel, do yourself a favor and get an EZ Lock set up. If you want to continue to waste your money, then go right ahead.