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Double-Time Flattening Stone

Original price $59.99 - Original price $59.99
Original price
$59.99 - $59.99
Current price $59.99
in stock, ready to be shipped
  • Two-Sided Dual-Grit
  • Large 10" x 4" Size
  • Flattens All Water Stones
  • Made in the USA
  • Our Most Popular Flattening Stone!

Double-Time Flattening Stone Logo

The First Double-Sided Dual Grit Flattening Stone

When we set out to create the ultimate flattening stone, our objectives were to create the best flattening stone possible, while still keeping it affordable. The Double-Time Flattening Stone is a Sharpening Supplies exclusive, the quality and features have never been matched.

When creating the stone, we first had to define what made a great flattening stone. We came up with five important factors.

  • First - It must be very flat.
  • Second - It must be large enough to flatten any water stone with ease.
  • Third - It must be made with the highest quality materials.
  • Fourth - It must flatten quickly and leave a smooth finish.
  • Fifth - It must be made in the USA.
Double-Time Flattening Measure Flatness

Guaranteed Flat

Our Double-Time Flattening stone is guaranteed flat. When our flattening stone is made, it comes out of the mold flat, but we take two additional steps to ensure it is guaranteed flat. First, each stone is hand-lapped to increase the precision flatness. Second, each stone is precisely measured to ensure flatness. It is sent back for additional lapping if it doesn't pass our flatness tests.

Double-Time Flattening Stone Size Comparison

Flattening Stone Size Matters

Our Double-Time Flattening Stone is 10" x 4". The size of the flattening stone matters for a few reasons. The larger stone is easier to use as your water stone stays on the surface. But total wear is another benefit. Our large double-sided stone has 80 square inches of total flattening surface. That is almost 3 times the wearable area of other popular flattening stones. It matters!

Seeing the Double-Time Flattening Stone next to other popular flattening stones shows the size difference. And, it's double-sided!

Double-Time Flattening Abrasive Close-Up

Hard Green Silicon Carbide Abrasive

We chose green silicon carbide as our abrasive material for our flattening stone because it is extremely hard and the particle shape cuts aggressively. It is harder than aluminum oxide, and also harder than the less expensive black silicon carbide. This makes it ideal for flattening as it cuts quickly and wears slowly.


Double-Time Flattening Stone In Use Photo

Two Sides for Fast Flattening and Smooth Surfaces

Just like with sharpening an edge, the coarser the grit the faster the cutting action. However, the coarser the grit the coarser the surface it will leave on your water stone. We experimented with different grits to find the best overall combination. We wanted to find a better solution to that compromise. Our solution was to make it double-sided. We invented the double-sided flattening stone.

The coarse side is a very fast cutting 120-grit. Especially when working on coarse water stones, this side provides the necessary cutting action to effectively flatten the stone. However, when flattening finer stones, a coarse grit leaves a finish that many find undesirable. That is why we put a 320-grit surface on the fine side. On water stones 1000 grit and higher, we recommend using the fine side to put a nice surface finish on the stone. The fine side can even be used alone on very fine water stones to put a fresh flat surface on your stone.

The distinctive grid pattern clears waste material quickly and efficiently, aiding the fast cutting action on both sides of the Double-Time Flattening Stone.

Made In the USA

Supporting US manufacturing has been important to us since we started our business almost 20 years ago. When we designed our flattening stone, we knew we could make a great flattening stone in the US. We feel that everyone benefits when quality products are made in the USA. We're not only supporting the economy, but we are producing a product with a quality that everyone can appreciate.

100% Satisfaction Guarantee

We're so confident that you'll like the Double-Time Flattening Stone that we're backing it up with a 100% satisfaction guarantee. If you're not happy with any aspect of the stone, just let us know and we'll gladly replace or refund your purchase.

Q. Does this work with all water stones?

A. Yes, we've tested it on many different water stones and it works well on all water stones.

Q. Can I flatten Arkansas Stones with the Double-Time Flattening Stone?

A. No. Arkansas Stones are much harder than water stones and will cause excessive wear to the Double-Time Flattening Stone. We do not recommend using it for flattening them.

Q. Is the Double-Time Flattening Stone sold anywhere else?

A. No, it is available exclusively from Sharpening Supplies.

Q. I've seen other flattening stones. How is the Double-Time Flattening Stone different?

A. The Double-Time Flattening Stone is the original US-made, double-sided, dual-grit flattening stone. When we designed it, we added quality in every step of design and production. Learn more about the quality of this flattening stone.

Q. How do you use the Double-Time Flattening Stone?

A. It is easy to use. We include instructions on the packaging, but we also have that information available on our Double-Time Flattening Stone Use and Care page.

Need more information?

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Monday through Friday, 8 a.m. - 4 p.m. CT
Phone U.S.: 1-800-351-8234

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