Shinwa · Japan's most trusted name in marking and measuring
Shinwa circular saw guides turn any handheld circular saw into a precision cutting tool. Line it up, run the saw along the edge, and get a clean, square cut first time.
Made by Shinwa4.9 ★
Average customer rating on our Shinwa guides
500+
Shinwa guides sold in the past year
±0.1 mm
Squareness per 100 mm on the Next Foldable range
Since 1971
Shinwa, Japan's measuring specialists
What customers tell us about them, again and again.
Ease of use
Line up. Cut.
Hook the guide over your timber, run the saw's base plate along its edge and you're done. Most guides hold in one hand, fold flat for the ute or toolbag, and work with the circular saw you already own.
Precision
±0.1 mm
Shinwa makes rules and squares first. The Next Foldable guides hold squareness to ±0.1 mm per 100 mm, and the T-Slide fences support the saw right to the end of the cut, so every piece comes out the same size.
Build quality
Stainless & aluminium
Stainless steel guide faces, rigid aluminium bodies and low-friction UHPE linings that let the saw glide without wearing the edge. Most of the range is made in Japan, and all of it is designed there by Shinwa.
Find your guide
Pick the job and we’ll show you the guides built for it.
Framing and sheet goods
From our best-selling range
Folds flat, locks at 90° or sets anywhere from 75° to 135°. Squareness held to ±0.1 mm per 100 mm.
$159
Docking stock to length
Two reference points 200 mm apart hold it square on wider boards. Solid aluminium.
$89
Everyday docking
Compact, solid aluminium square for fast, accurate cuts to length.
$74
Toolbelt speed square
Lipped fence hooks over the timber for one-handed 45° and 90° cuts. Just 275 g.
$54
Small stock and battens
Pocket-sized square with a 50 mm projection for the saw's base plate to register against.
$52
Full-width sheet cutting
Back soon
Our most popular guide. A full metre of reach for ply and panels, folding to 100 mm wide.
Wide boards and panels
Back soon
The sweet spot between reach and portability, with the same 75°–135° angle adjustment.
Ripping sheet goods
Only 1 left
Track-saw-straight rips on saw horses. Folds to 89 mm wide; SUS304 stainless rod.
$105
Compact ripping
Only 3 left
The same folding T-Slide design in a shorter, lighter size.
$98
Saws with two guide slots
Dual 12 × 3 mm arms for extra stability on wide rips.
$110
Ripping ply and timber
Best seller
Rigid fence on a low-friction slide that supports the saw right to the end of the cut.
$59
Narrow rips and trims
Compact T-Slide with an adjustable fence and built-in stabilisers.
$55
Any angle, 15°–165°
Made in Japan
Dial in odd angles for framing and joinery in 5° steps, long enough for wide stock.
$110
Quick mitres on trim
20°–160° range with a detent pin for instant 45°, 90° and 135°. Folds for the toolbag.
$69
No track to set up and nothing to calibrate.
01
Mark your line
Measure and mark the cut as you normally would.
02
Set the guide
Hook the fence over the edge, or set the angle, and align the guide to your mark.
03
Run the saw along it
Keep the base plate against the guide edge. The guide does the steering.
About Shinwa
Shinwa Rules has made precision rules, squares and measuring tools in Niigata, Japan since 1971, and is an accredited manufacturer under the Japan Calibration Service System. It's the name Japanese carpenters reach for when a measurement has to be right.
Their circular saw guides apply the same standards to cutting: true edges, square fences and materials that hold their accuracy after years of site work.
Real reviews from Japanese Tools Australia customers.
Best circular saw guide
“Ok you buy a circular saw and they supply it with a bit of stamped tin plate and call it a saw guide. My Makita was no different. I bought this yesterday and used it today cutting up five sheets of 12mm plywood for weatherboards on a shed I'm building. It easily fitted my saw and remained in place to the correct dimension for the whole job. Each piece cut has come out as a uniform size. The rule on this is absolutely spot on as you'd expect anything with the Shinwa brand on it to be.”
“One of the best investments I've made on tools this year. Works as described but even easier to use than I expected and useful for most cut lengths over 250mm.”
Perfect.
“I have a tracksaw but no parrallel guide kit, this solved my problem and allows me to use my cordless circular saw for 90 deg cuts + any other angle I desire.”
See Ya later, Speed Square
“This thing replaces a speed square in my tool belt. The base plate of the circ saw slides well against this square guide. Makes cutting sticks a breeze.”
Best circular saw guide
“Best guide I've used, great to have the extra length in the fence.”
Saw guide
“Very ergonomic, very functional, very happy”
Cutting to length (docking timber, cross-cutting sheets): a square guide. Pick the length that covers your widest stock. Ripping to width: a parallel T-Slide guide. Odd angles: the Free Angle Neo or Adjustable Angle Mini. Not sure? Email us what you're cutting and we'll recommend one.
The square and angle guides work with any handheld circular saw, corded or cordless: the base plate simply runs along the guide's edge. The T-Slide parallel guides slot into your saw's base and need a 12 × 3 mm guide slot, which most saws have. A few cordless saws with very thick base plates don't sit well on the Next Foldable range, so if you're unsure, send us your saw model and we'll confirm.
The slider fits the groove on the Next Foldable guides and keeps your saw riding against the guide, so the base plate can't drift away from the edge mid-cut. It makes repeat cuts faster and is our most-added accessory.
The stamped fence supplied with most saws flexes and wanders. Shinwa guides are rigid aluminium and stainless steel, built by a company that makes precision rules and squares, so your cut follows the line you marked.
Orders placed before 12pm are dispatched the same day, with free shipping on orders over $200. If it's not right for you, return it within 14 days, no questions asked.
Find the Shinwa guide for the cuts you make most.
