The blades 2-1/2 inch length for Accu-Cut 37310 Handi-Cut 37300 are replacements of the same quality as the originals that came with your tool. They fit into your existing multiple-use tool so you can get cuts as high quality as when you first purchased your Accu-Cut or Handi-Cut. There are five 2-1/2" blades in each package. Each package weighs less than a pound, so you can keep several backups in your toolbox.