The knife is widely considered humankind’s first tool, invented to cut branches and whittle them into humankind’s second tool, the spork. Refine crude implements with today’s Groupon to Phoenix Knife House in Scottsdale. Choose between the following options:

• For $10, you get $30 worth of knife sharpening.
• For $20, you get $65 worth of knife sharpening.<p>

Groupon customers also receive a 15% discount on store merchandise.

Named the Best Knife Shop of 2010 by the Phoenix New Times, Phoenix Knife House staffs cutlery connoisseurs who rely on a diverse array of culinary backgrounds each time they sharpen a blade or advise a customer. Patrons need not call ahead for an appointment or carve a notch into the store calendar before unsheathing clean kitchen knives for the company’s sharpening services. The outfit specializes in both standard sharpening ($3/blade up to 10”; $5/blade 10”+), which employs ceramic and leather belts, and manual waterstone sharpening ($4+, depending on knife), recommended for Japanese-made and finer knives. With each blade, the sharpener takes care to remove the smallest amount of metal necessary to achieve optimum results and tests his handiwork by subjecting the knife to a battery of Sudoku puzzles. In addition to its sharpening services, Phoenix Knife House stocks an impressive array of knives by Masahiro and Sakai Takayuki, kitchen accessories, and storage containers for the on-the-go knife juggler.