The NewGrind RX7 Mini - 3 Head Grinder accessory features a triangular frame with four red circular pads secured by black screws, shown resting on concrete with a blurred background.

A black metal gearbox for the NewGrind RX7 Mini - 3 Head Grinder, with a top metal mounting point and a bottom cylindrical shaft, is shown on concrete.

NewGrind RX7 Mini - 3 Head Grinder - Image 3

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NewGrind RX7 Mini – 3 Head Grinder

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Categories: Rental Equipment, Equipment, NewGrind Products Tags: concrete equipment, grinder

Our Happy Customers

Discover why professionals and DIYers trust Contec Supply. Our collection of 5-star reviews showcases the results and hands-on service we're committed to providing. Learn how we've become the trusted resource for decorative concrete solutions.

Troy Lybbert

June 10, 2025

Great people! Super helpful!

sosaia wolfgramm

May 9, 2025

Very professional and helped me understand different products. Thank you Craig and Duane

solkyle1

April 21, 2025

Excellent service! Dwayne was super helpful and went above and beyond.

Alex Gabriel

April 7, 2025

What I like about this place is that the staff is well informed on their products. They sell what they know and they will help you out on your projects. They sold me concrete finishing aid such as Day 1 and helped me get such amazing cure and seals for my concrete jobs. Everything from the basic stuff for everyone's needs to the quality products that I use for my stamped concrete. Appreciate that their staff for helping me out pick the quality products for my jobs. Will be coming here more often.

jared murillo

March 24, 2025

I’ve been a customer of Contec Supply since early 2018, when I first epoxied my basement floor. At the time, I had never worked with epoxy before, and honestly, I was a bit overwhelmed. But Duane made sure I had help every step of the way. His support was absolutely invaluable—I could reach out with questions and he was always available and willing to guide me through the process. Now, seven years later, I’m refinishing the same floor, and there’s no question where I’m going for my supplies. Contec Supply has earned my trust, and I wouldn’t go anywhere else. Quality products, outstanding service, and real expertise—you can’t beat that.

Dallen Rozema

March 1, 2025

Duane went out of his way to make sure I had my product when I needed it along with expert advice on how to install it.

David Munson

February 4, 2025

Great service. Don’t get you products and lowes and Home Depot!!

Scott L. Howell

November 5, 2024

They provide outstanding service, very honest and forthright and just overall nice guys.

Dave T

January 30, 2024

There is no better place to get your supplies and get professional help then Duane’s place. Absolutely the best

A and S Services, LLC

September 22, 2023

This place is great, no "secret handshake" required for great service. They always know who I am before answering the phone even-though I'm just a small customer. Always take great care of me and are very familiar with the products they sell.

JACQUES BEHRINGER

August 24, 2020

Great concrete supplier. The owner Dwayne knows his stuff and is always willing to help out with any information.

Erik Olson

April 25, 2020

I can’t imagine how I could’ve accomplished a great turnout with sealing my garage floor if it weren’t for Duane’s help. I’m astonished by how great of product and customer service I received.

Jake Christensen

December 11, 2019

Contec Supply is by far the most personal business I’ve been to. All of the Contec team is amazing at getting the products you need for your job. Duane is a scientist in the concrete world, and will always get you your products and more. He is very passionate about his business and all around a great guy. This is why I’ve been buying from them for over a year now, I would hands down recommend Contec to anyone looking to do a DIY project or massive custom homes builds. From counter tops forms, to massive cement overlays to a simple concrete waterproof spray, Epoxy and multiple flake choices to choose from Support your Local Business I’ve gone to a few seminars of theirs and those are super helpful to those looking to expand there business..

Tanner Christensen

November 5, 2019

Duane is extremely knowledgeable of anything and everything concrete. Also is willing to share his know how with those looking for help with various projects! HIGHLY recommended Contec Supply!

Lionel Longson

September 9, 2019

I would HIGHLY recommend Contec and the owner Duane. He went over the top in helping me (a rookie) understand how to prep and apply his product. Stayed at least an hour and a half after closing to make sure I understood how to do everything correctly. The product is fantastic, and my garage floor turned out AMAZING!!!

Boingo Diez

May 2, 2019

Great guys here.

Bret Russell

February 18, 2019

Duane and his staff our always willing to help and make sure you get what you need great place to do business

Bruce Bigford

November 28, 2018

I buy all my products from Duane at Contec Supply. He is very knowledgeable about concrete coatings so his advice is very helpful in determining the best product for the job.

Angie Gilbert

October 25, 2018

Amazing service, top quality and durable. My counters look amazing!

Jaron Krebs

June 19, 2018

My favorite stop to make while gathering up supplies for a job! Duane always helps me keep it simple and walks through everything I need for the job.

Steel Gardner

November 19, 2017

Contec Supply is fantastic supplier of concrete coatings, sealers, and information. Duane has been in the industry for 20 plus years doing jobs himself. Duane is always happy to share his advice and experience to contractors looking for new avenues to expand their trade and home owners looking to do a diy project. Contec Supply supplies all sorts of different materials from several manufacturers and only sells quality products they've tested. If your looking to do anything with concrete, countertops, sealers, or other similar products. Definitely check them out.

prideinconcrete

September 29, 2017

Great product's and a wealth of information

Michael Harding

January 25, 2017

Really good counter tops and concrete floors. Planning on getting one, but I've seen them in real life, and they are awesome.

Alex Bohl

November 6, 2016

They are very knowledgeable about their products and you can trust their advice since they also install all of them and do trainings. Great products and selection.

Spencer Love

July 5, 2011

I really enjoyed the class to took at Contect supply, the instructor was very helpful and was very knowledgeable and was able to answer the questions that I and other people in the class had. The products that they offer are very high quality and reliable. If you a re thinking about expanding your work or even just getting better at decorative concrete i would recommend swinging by Contec Supply, you wont regret it. They have great customer serving and are always there to help when needed if you find yourself in a bad situation.

NewGrind RX7 Mini – 3 Head Grinder

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NewGrind RX7 Mini – 3 Head Grinder

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