The anatomy of a chef’s knife: every part, explained

A chef’s knife looks like one simple object, but it is closer to a precision tool with seven or eight functional zones. Once you can name them, everything else gets easier: you use the right part of the blade for each task, you understand what a salesperson is actually describing, and you notice wear and damage while it is still cheap to fix.

The tip is the front quarter of the blade — the precision zone. It scores, trims, and does fine work like deveining prawns or coring tomatoes. It is also the most fragile point on the knife: most broken tips we repair were levering jar lids or prying frozen food apart, jobs no tip is designed for.

The edge is the entire sharpened length, and on a quality knife it is not uniform. The middle section does most slicing; the flatter rear section handles chopping. The geometry — typically 12–15° per side on Japanese knives, 18–20° on German — is set by the manufacturer to match the steel, which is why professional sharpening should always restore that original specification rather than impose a generic angle.

The spine is the unsharpened top. Its thickness (anywhere from under 2 mm to over 3 mm) tells you the knife’s character: thin spines slice effortlessly, thick spines add strength and weight. A well-finished spine is rounded and polished so it does not bite into your fingers during long prep sessions.

The heel is the rear, deepest part of the edge. It is the power zone — the place for cutting through chicken joints, hard root vegetables and anything that needs force, because it sits closest to your hand and transmits the most leverage.

The bolster is the thick collar where blade meets handle, found on forged knives. It adds balance, acts as a finger guard, and stiffens the junction. But there is a catch: a full bolster that extends all the way to the edge blocks sharpening at the heel. Over years of grinding, such knives develop a tell-tale curve where the heel no longer touches the board. German makers have largely moved to half bolsters for exactly this reason — and grinding back an overgrown bolster to restore full edge contact is a standard repair in our workshop.

The tang is the extension of the blade steel into the handle. A full tang runs the handle’s entire length and width — you can see the steel sandwiched between the handle scales, usually secured by rivets. It gives strength and rear balance. A partial or “rat-tail” tang ends inside the handle; it is lighter and not automatically inferior, but on cheap knives it is where handles work loose. Japanese wa-handled knives traditionally use a hidden tang glued into the wooden handle — a perfectly durable design when well made.

Handles come in stabilised wood, pakkawood, polypropylene and POM composites. More important than material is fit: there should be no gaps at the bolster or rivets, because gaps harbour moisture and bacteria and signal future loosening. Check that rivets sit flush — proud rivets abrade your palm over a long session.

Use this checklist when buying a knife, or when deciding whether yours needs professional attention:

Every part of this system depends on the edge being maintained correctly. When your knives need attention, order online — we take batches of 5 to 20 — pack them into the protective shipping kit we send, and a courier collects from anywhere in the UAE. Each knife is inspected tip to tang and sharpened to its manufacturer’s specifications, back in your kitchen within 7 days.