The utility knife is one tool a well-stocked workshop should never be without. At $5 to $15, this retractable knife is inexpensive and easy to use. It's a pint-sized workhorse that can be harnessed to break down cardboard boxes, trim carpet, cut drywall, splice cords or accomplish myriad other workshop tasks.
Although you can occasionally find nonretractable utility knives available for purchase, steer clear. Wielding -- and storing -- a perpetually open, razor-sharp knife is just a bad idea.
On the flip side, retractable utility knives with snap-off blade segments are ideal. Because the thin blades dull quickly, you can simply snap off worn sections as needed (as long as you've availed yourself of pliers and safety goggles) [source: Mahoney].