Sharp Cutting Blade:
A craft knife has a sharp cutting blade and handle. The blade is drawn through paper or cardstock. To use a craft knife the paper or cardstock must be placed on a cutting surface such as a cutting mat. This not only protects the work surface but also provides a durable surface to cut into that will not dull the craft knife blade. Most craft knives have changeable blades, therefore a new blade is fitted when the blade dulls instead of sharpening the blade.
Precise Cutting:
A craft knife is good for precise cutting and is an ideal alternative to scissors for many projects. It is ideal for cutting out intricate and detailed shapes. Many craft knives are held like a pen and this makes them relatively easy to use. In rubber stamping, a craft knife is particularly good for cutting around stamped images.
Buying a Craft Knife:
Craft knives are readily available from craft supply stores. A craft knife is often sold packaged with spare blades and blades are also sold packaged separately. Craft knives are also widely available online. 
Tips for Buying a Craft Knife
Here are some tips to help you buy the right craft knife for rubber stamping and paper craft projects:- A basic craft knife will be suitable for most rubber stamping projects. However craft knives with retractable blades are particularly useful if you travel a lot with your craft knife as this takes up less space and is safer to carry.
- Look for craft knives with comfort grips or shaped handles if you have problems holding small items.
- Buy a pack of spare blades. Blades are relatively inexpensive and it is useful to always have a sharp spare blade to hand
