Anatomy of a chef’s knife
The handle: A good handle is one that feels comfortable and secure to you. You shouldn’t have to strain to hold onto it, and it shouldn’t feel slippery when wet. There should be enough clearance on its underside that you don’t bang your knuckles as you chop (the height of the blade affects this). Some knives’ handles have molds or indentations to facilitate grip. These work for some people. For others they force an unnatural grip and make the knife hard to hold at awkward angles, such as when butterflying a chicken breast or carving a melon.
The bolster: Also called the collar, shoulder, or shank, the bolster is the thick portion of metal where the blade and handle meet. The bolster can add strength and stability to a knife as well as act as a finger guard for your gripping hand. Some forged knives have only partial bolsters, which don’t extend all the way to the blade’s heel, and some knives, especially Japanese-style knives, have no bolster at all. An advantage to partial- or no-bolster knives is that you can sharpen the full length of the blade, right through the heel. As you hold a knife, notice the slope from the bolster to the blade. It may be pronounced or gradual, but neither style should make you feel like you have to tighten your grip.
The heel: Unless it’s a Japanese-style forged knife (see "What is a Japanese-style chef's knife?" below), the heel is the broadest and thickest part of the edge with the greatest heft. It’s meant for tasks that require force, such as chopping through poultry tendons or the hard rind of a winter squash. Watch out for knives that “thunk” at the heel when rocked. The heel shouldn’t abruptly stop the rocking motion. Nor should it be so curved that the blade wants to kick backward.
The spine: This is the top portion of the blade, and it typically has squared edges. Note whether the edges feel polished or sharp and rough, which can potentially irritate your gripping hand. The spine should also taper at the tip; a thick tip will be hard to work with.
The edge: A good chef’s knife should be sharp right out of the box. To evaluate sharpness, try slicing through a sheet of paper. A really sharp knife will make a clean, swift cut. (Of course, if you have the opportunity, chop some food, too.) Also note the line of the blade. A gentle curve from the tip to the heel can help the knife smoothly rock back and forth during chopping and mincing.