Using the nearly obsolete cone wrench for spreading peanut butter is a noble application of the bike shop icon. Using it to spread brake pistons, however, is an indication of beater status. Unlike the purpose designed Park Tool Brake Piston Press, its edges are pad damaging sharp and you're bound to bend the handle. Not to mention, peanut oil residue on pads or brake dust in your lunch isn't going to lead to good things down the road. The Brake Piston Press is designed specifically to slide in between pads without compromising integrity so reinstalling wheels and calipers is a struggle free affair. It's constructed from steel, with a rubber handle that's offset for easy, ergonomic use.