This package of two Replacement Cutting Blades is designed by Tim Holtz for Tonic Studios. These replacement blades coordinate with the Tim Holtz 12.5" Precision Trimmer (sold separately) from Tonic Studios.  These spare blades can be cleaned with a damp cloth, but make sure they are completely dry before replacing them. Do not immerse these blades in water. These blades are sharp, so handle them with care and keep away from small children. These blades should be stored in a cool, dry place. These blades measure 2.25" in length and 0.75" in height. These blades are easy to replace on the blade track.