Dewalt Knives & Blades Snap-Off Knife With Auto-Lock Slider 25Mm DWHT0-10250 About this Item: The Dewalt snap-off knife has an auto-locking slider for blade adjustments. The integrated blade snapper ensures you'll have a sharp cutting edge without having to manually change out a blade. The autoload function automatically draws a blade from the cartridge which can hold up to 6 blades. Supplied with 3 x carbide blades which can last up to 10 x longer than a standard conventional carbon steel blade.