http://www.createforless.com/Olfa+Ro...utm_medium=cse
this is the one i have and i love it. the blade comes out when you grip the handle. very easy to do and it goes back in when you let go so you don't have to close it yourself. the red button is to lock it in an open position. I never use it. It's ergonomic too. Olfa is the best.