The TripleTrack High-Profile Cutting Blades feature a high-profile grip for a secure, comfortable grasp. Easy-to-install design lets you quickly remove and replace dull blades. Each trimmer is marked with the letter corresponding to which blade it uses for simple use. Replacement blades are designed for Fiskars trimmers with a TripleTrack rail design (sold separately).The TripleTrack High-Profile Cutting Blades feature a high-profile grip for a secure, comfortable grasp. Easy-to-install design lets you quickly remove and replace dull blades. Each trimmer is marked with the letter corresponding to which blade it uses for simple use. Replacement blades are designed for Fiskars trimmers with a TripleTrack rail design (sold separately).