Good piece of gear. We cut into a lot of bags and boxes and it is nice to be able to just snap off a dull piece and keep going with out having to switch blades.
The 18mm Ceramic Extendable Snap Blade is offering a beefier ceramic blade for those big cuts when you're working on something a little tougher to cut.
The blade locks in place by seperating the thumb switch giving you the control you need. Extend only the amount you need for detail or shallow cuts.