10 Best Diamond Sharpeners 2025 in the United States

The Work Sharp Precision Adjust Elite Knife Sharpener is a strong contender for anyone looking to maintain their kitchen, hunting, or serrated knives. One of its key strengths is the variety of abrasives included; with seven different grits ranging from 220 to 800, it allows for versatility in sharpening needs. This is particularly beneficial for users who have different types of knives or want to achieve various edge finishes. The adjustable sharpening angle between 15-30 degrees is another highlight, making it user-friendly for both novices and more experienced users wanting to customize their sharpening techniques.

The design is practical, with features that enable quick switching between grits, which helps streamline the sharpening process. Additionally, the 3-year warranty adds peace of mind, reflecting the manufacturer’s confidence in the quality of their product.

This knife sharpener is a great fit for home cooks and outdoor enthusiasts who value precision and versatility in knife maintenance. Its robust design and wide range of features make it a reliable choice, but be prepared for a little patience as you get accustomed to its operation.

The Work Sharp MK2 Professional Electric Knife and Tool Sharpener is an excellent choice for anyone looking to maintain a variety of blades, from kitchen knives to outdoor tools. One of its standout features is the flexible belts that adapt to different blade shapes, allowing for versatile sharpening of serrated knives, scissors, and more. The two-speed motor offers users control for both light and heavy sharpening tasks, which can be particularly useful when dealing with tougher tools like lawnmower blades and axes. The edge guide ensures that knives are supported throughout the sharpening process, enhancing the ease and effectiveness of the task.

In terms of grit size, this sharpener includes coarse, fine, and medium options, making it suitable for various sharpening needs. Additionally, the compact size and lightweight design mean that it won't take up much space in your kitchen or workshop. The 3-year warranty further adds to its value, giving you peace of mind regarding long-term use.

However, there are a few drawbacks to consider. While the sharpener is effective, the reliance on belts means that you will need to replace them periodically, which can add to the overall maintenance cost. Also, it doesn't have a traditional diamond sharpening feature, which some purists may prefer for precise sharpening tasks. The base material is primarily stainless steel, but it's manufactured in China, which may raise concerns for those seeking products made in the USA.

The SHARPAL 162N Double-sided Diamond Sharpening Stone is designed for fast and efficient sharpening. It features industrial-grade monocrystalline diamonds electroplated onto a sturdy steel base, ensuring durability and heavy-duty performance. Users benefit from the dual grit system with Coarse 325 grit for quick edge setting and Extra Fine 1200 grit for honing, making it versatile for sharpening various hard materials like high-speed steel, carbide, ceramic, and cubic boron nitride.

The sharpener's super flat surface, ensured by SHARPAL's MirrorFlat technology, provides consistent contact with tools, which is advantageous compared to oil stones and water stones that can wear unevenly over time. Its ease of use is enhanced by the ability to sharpen dry without the need for messy oils or water. The included storage case with a non-slip base and angle guide offers convenience and safety during use, catering to users who might be less experienced in sharpening techniques.

Additionally, SHARPAL provides a robust after-sale service with a 3-year commitment, ensuring customer satisfaction and support. While it boasts excellent features, the sharpener's size and weight might be a consideration for users needing a more portable option. The SHARPAL 162N is a strong contender for those looking for a durable, efficient, and user-friendly diamond sharpening solution.