Lansky Master's Edge All Diamond Sharpener (MEDGE1D) review

The Lansky Master’s Edge All Diamond MEDGE1D is a manual tabletop rod system with three marked plain-edge positions and a separate triangular rod for serrations. Its exact package identifies 400- and 600-grit round diamond pairs, while leaving the triangular rod’s grit unstated. This research-based assessment distinguishes it from ceramic MEDGE1; it is not a hands-on test.

What the all-diamond SKU includes

Lansky’s exact record identifies the product as Master’s Edge All Diamond Knife Sharpener, SKU MEDGE1D. Its package description lists a pair of medium 400-grit diamond round rods for sharpening, a pair of fine 600-grit diamond round rods for polishing, and a three-radius triangular diamond rod for serrations, awls and fish hooks. The exact record does not publish a grit for that triangular rod. It also identifies a rubberized non-slip base, an integrated hand guard and snap-in storage.

The package has the same broad countertop format as the ceramic MEDGE1, but it is not merely a new finish or a second name for the same set. MEDGE1 is the ceramic system with different grit values and a different cleaning note. Check the SKU and exact rod inventory before buying, especially if the abrasive material or a particular grit is important to your routine.

How to use its marked rod positions

The manual instructions call for a stable, flat working surface, opening the hand guard, and placing the chosen rods in the selected guide positions. The user holds the base with the non-dominant hand beneath the guard, keeps the knife upright and draws the blade down and toward the user along the rods. Lansky describes 10–20 strokes per side as a usual starting procedure. That figure is from the maker’s instructions; this assessment does not claim to have reproduced it or measured the resulting edge.

The exact record marks 17°, 20° and 25°. Lansky associates 17° with fillet knives and fine slicing; 20° with slicing, butcher, paring and skinning knives; and 25° with hunting, camping, utility and chef’s knives. These are three discrete points, not continuous adjustment throughout the 17°–25° span. The exact page does not tell whether the marks are per-side or inclusive. Treat them as settings the sharpener documents and check the knife maker’s angle convention rather than assuming a number is automatically appropriate.

The optional two-stage procedure is specific

The manufacturer also describes a two-stage path: use 20° for a thinning pass of 10–12 strokes on each rod, then reposition at 25° to finish the edge. The page calls the result a compound bevel. It does not claim that settings between those two marked positions exist. It also does not explicitly assign one of the diamond rod pairs to one angular stage: the round 400-grit pair is identified for sharpening and the 600-grit pair for polishing, but the article should not turn that into a more detailed progression than the instructions provide.

This makes the key decision practical rather than numerical alone: a buyer should decide whether the listed positions and maker-described sequence suit the knife’s existing edge and intended task. The angle marks do not prove that the knife’s heel, belly, tip or handle clears the base, and no blade-length limit or geometry chart is supplied. Check those details for the exact knife if its shape is unusual.

A separate three-radius route for serrations

The exact product page includes a triangular rod distinct from the two round pairs. Its instructions describe selecting a radius that fits each serration, choosing one of two guide holes for the direction of the serrations, moving through the scallops individually and then laying the rod against the back of the edge to address the burr. The maker lists the triangular rod for all types of serrations, awls and fish hooks, but it provides no dimensions for serration compatibility.

The numbered 17°, 20° and 25° positions are not assigned to this separate serration procedure in the exact instructions. Do not infer a numeric serration angle from a plain-edge rod setting. The page does not list a scissor-sharpening method either; awls and fish hooks are different non-knife tasks.

Diamond care and package unknowns

The care note is materially different from the ceramic sibling’s. For MEDGE1D, Lansky says not to apply oil to diamond surfaces: clean them with water, wipe away filings with a lint-free rag and let them dry fully before the next use. The source does not establish that any particular cleaning cloth, brush or liquid comes in the box. Follow the instructions for this exact SKU rather than transferring ceramic-rod care from MEDGE1.

The exact product description lists the base, guard and rods but does not list a leather strop or compound. It also does not provide complete seller-specific box contents or a strop confirmation. The source gives no maximum blade length, scissor support, measured results, service life or independent speed comparison. The all-diamond label alone does not establish better performance for a particular steel or a guaranteed finish.

Who should compare the two Master’s Edge versions?

MEDGE1D is worth comparing if you specifically want the listed diamond round surfaces—400 grit for the medium sharpening pair and 600 grit for the fine polishing pair—and the exact page’s dry-cleaning instructions. MEDGE1 provides ceramic rods at 600 and 1,000 grit and an explicitly 600-grit triangular rod. Both versions list the same three broad guide positions and a serration operation, but their abrasives, grit labels and care are separate. Read the ceramic MEDGE1 assessment before treating either product as a substitute for the other.

Before ordering, verify that the package is MEDGE1D, not the ceramic MEDGE1 or a replacement component. Confirm which rods and base are present in the exact seller offer, then use the diamond-specific care instructions. Price, stock and seller quality were not assessed here.

Evidence note: This assessment uses the exact Lansky MEDGE1D record, not a physical review. No ownership, hands-on sharpening, test, measurement, comparative performance claim or customer experience is claimed.