Bosch DWM40LK Miter Finder Digital Protractor/Angle Kit with Extension Leg and Case

Editorial Review
About the Bosch DWM40LK Miterfinder Digital Protractor Kit
The Miterfinder digital protractor is much more than the name implies. This amazingly versatile product provides four tools in one. It's an angle finder, a compound cut calculator, a protractor, and a level in one convenient package.

Angle finder:

Compound cut calculator: The compound cut calculator automatically determines the exact miter and bevel settings necessary to make each crown molding cut fit precisely.

Protractor: The protractor precisely positions the workpiece or the intended cut line at the angle you require.

Level: The built-in vertical and horizontal spirit levels are accurate to 0, +/- 0.05 degrees.

In addition to these helpful functions, the DWM40LK lets you freeze measurements, and it has a digital readout that displays readings on the front and the back, so it's easy to use in any position. Ruggedly constructed and built to last, this digital protractor will become your go-to accessory for every project around the workshop or at the job site. This kit includes a hard, thermoformed foam carrying case and a leg extension.

Applications
Use the DWM40LK to calculate the exact miter and bevel angles for crown molding cuts, measure trim cuts for remodeling, check and transfer angles, accurately install cabinets and counters, measure roof angles, fit up windows or doors, align wood forms for concrete pouring, fit carpeting and parquet or tile floors, align and check banisters and rails, and much, much more.

Key Technical Specs

Vial accuracy: +/- .05 degrees
Electronic accuracy: +/- .1 degrees
Readout accuracy: +/- .1 degrees
Measuring range: 0 - 220 degrees
Battery lasts up to 100 hours
Leg extension is 16 inches long

Warranty
The DWM40LK Miterfinder is covered by a 1-year unconditional Bosch warranty.

What's in the box:
Bosch Miterfinder digital protractor, padded nylon case, and 16-inch leg extension.
Cached date: AWS Called=true

Customer Reviews

invaluable

2008-02-15
I'm a novice building a big sailboat and have found this tool invaluable for taking compound angles off a structure that has few straight lines in it. Climb into the hull with a list of the pieces needed; take the angles correct to 1/10 degree off, and write them next to each item; get down and run them off on the SCMS. THEY'LL FIT! For inside measurement the Lee Valley gadget that holds two 1/4"x3/4" battens to exact length is a perfect companion. And the numbers on the list don't change if you bang it against a bulkhead like a bevel gauge will.

Another quality Bosch tool

2008-01-14
I have not used the Miter Finder for its intended purpose yet which is completing the crown molding in a few rooms in my basement. I have however used it to hang a railing, replacing rotten wood on my roof, and building shelves under the stairs. It works great and makes anything with angles much easier to do.

Can You Cut Crown Molding?

2007-10-13
As a DIY homeowner, I had no experience in cutting crown molding yet every room of the house was getting it. This device makes it very easy to transfer the corner-by-corner results to the compound miter saw settings. It would be hard to make a major mistake. Though I am not finished with this ongoing project, at least my trim work is looking better than it would have. It also helps to like gadgets (tools when describing them to the significant other). I personally find this is an easy one to use. You can find circumstances where the size is a problem yet most can be worked around. I have no idea if the trades people ever use/need these but if not they work great for the DIY homeowner.

very easy to use right from the start

2007-10-01
I bought this item because by husband & I own a cabinet & custom counter top business. When we go to our customer's houses to measure for their new counter tops it is important to know the angle of the corners in case it is not a true 45 degree angle so when the tops are built the mitered corners will work. So far it has proven to be very accurate & it was so easy to use right from the start - a very user friendly tool! I recommend this for anyone who feels they have a need for knowing degrees of angles - it will save time. It also seems to be very well built. I would gladly recommend to this to anyone.

A Better Miter Finder

2007-09-24
Works very well. No guesses on the angle. Simple and easy to read. Digital meter is straight up with no fluctuations in the reading.

Proof is in the picture

2008-06-07
I have been looking for a tool like this for a while and when I saw it I had to have it. The first thing I did was to prove that my dining room is not square. Crown molding is a challenge when everything is square; when it is not it gets expensive to get it right. It will come in very handy for me and for some of my neighbors when I show it off.

Great miter finder/protactor

2008-05-06
This is a well made instrument by Bosch that does exactly what is was designed to do. It seems to be extremely accurate. I like the fact that it has a built-in calculator that makes finding miters much easier. Now that I have it I am finding all kinds of uses for it. I've used it to check the angles and levels on my miter saw, table saw, and belt sander.

Great tool, but it may not last!

2008-03-18
I bought this tool about 1.5 years ago and I've loved using it until today. I tried to turn it on to complete a job I am running behind on and nothing. I put in a set of new batteries and..... nothing. I called the Bosch service center and basicially there are four parts available for this level, none of which are electronic. If you have an electronic problem the tool is a throw away after the one year warranty.

Before you guys think I abused it, I can assure you I did not. It stays in a padded case that I use for my Stabila levels and has never even been dropped or submerged or anything else you might be thinking. It just quit.

Since I had nothing to lose and I needed it yesterday, I tore it apart. Most of the electronic construction is micro chip except for 3 capacitors. I desoldered and tested them and found one bad one (4.7mf @ 63V). After a trip to the electonic supply I had the level up and running as good as new.

I came to realize how much I rely on this tool and how much of a problem it can be if it fails. I am now looking for a quality machinist protractor like a Starrett C359 or equivalent on ebay so I can be assured that my job will continue if this one goes out again.

In a world of electronics it might sometimes be better to just keep things simple, mechanical, and RELIABLE. Even though it was fixed for very little money it did eat up half a day which cost me far more than this level did.

Just something to consider as you make your buying decision.

A versatile, quality made tool

2008-03-05
I bought the Bosch DWM40LK because I was installing a lot of crown molding. I used it for the crown and also when I built a bar.

It is a precision protractor and is well made. The extension leg comes in handy for the long sides needing measurement.

viperhal

2008-03-02
A fantastic tool for crown molding, it makes outside corners a breeze. I use it mostly for installing baseboard and trim molding. I also use it to keep my compound miter and table saws honest. It hasn't replace my speed square or sliding bevel; makes a very nice addition to my top hand tools. The carrying case is nice and helps keep the tool out of harms way.