OLFA-Comfortable handle designed to reduce hand and wrist fatigue. Squeeze handle to expose blade for cutting. Blade self-retracts for safety when not in use. Dual-action safety lock allows the user to lock the blade open for comfort and closed for safety. For right- and left-hand users. Cuts up to six layers of fabric. Includes RB45 blade. Fits RB45, Pinking, Scallop and Wave Blades.