We recommend that you buy the package deal for the most economical purchase. When you are in full swing with trimming, you do not want to have to stop and clean your scissors every 5 minutes. Therefore, having several pairs of Pro 420 scissors will keep your work flow going. Once your scissors have become resinous, simply place them in a jar of rubbing alcohol, let them soak for a few minutes, remove them and wipe them down before resuming. Having two pairs allows you to continue your work uninterrupted.