This carpet knife has a slim profile and heavy knurling on the body and up front for better grip and precision cutting. With a turn of the folding thumbscrew, it pivots open for blade storage. Blades are easily removed with a teeter-totter action. Blade clamp is magnetized for easy blade changes. Takes standard slotted razor blades. Blades: No. 306, 308, and 309. No blades are included with this knife. Net weight: 4 oz.