The below Testimonial was posted in the Forum section of www.DooTalk.com.

I just picked three of my sleds, I did a lot of research with what stud to use, I ended up going with Mack Studs and don't have one single regret. The picks are awesome, the design and the way they were built, also the backers are great there very thick and wide but still light. The biggest part is that the owners Jim and Carla are just great people to deal with, they are quick to answer questions, you can always reach them if you need something. Jim definitely stands behind his products with a five year bend or break warranty, which is awesome He also sells everything you need to be able to stud your sled, templates, drill bits, tunnel protectors, and even the hardware to remount your tail flap. I had a bag of Woodies gold diggers to compare them to and they made the Woodies look like junk. I will post some pics of all of it. If you thinking about studding your sled check out these studs www.mackstuds.com .

The below is a review by the staff at American Snowmobiler. www.amsnow.com.

For more than 15 years Mack Stud of Pelham NH., has been producing traction products for just about every snowmobile application from racing to leisurely trail riding. Though not as well known as some other traction producers, this last year AmSnow had the opportunity to test two sets of these zinc plated, heat treated, push through, studs. They have a 60o Welded Carbide Tip - similar to other traction products throughout the industry - but the 1/4 inch deep tip is stronger than some products we've seen.

We had both the 5/16 x 1.075 inch studs - these give more bite to your 1" lugged track - and the 5/16 x 1.325 inch, which will work on your 1.25 inch lugged track. We have always been fans of square backer plates, which we again used with these two stud packages.

There are no double backers here, and we followed Mack's own 96-stud package template. The backers come in 6 different finishes from Mack including red, blue, green, gold, silver and a matte metal finish so they match just about any color machine you own.

We didn't have one bent or pulled stud all winter and we were pleased with the minimal wear we saw after several hundred miles.

We also we pleased to see that at Mack you can buy complete packages of studs, backers and fasteners for a little less than many competitors. And you don't have to buy each of the components separately, which can take some of the confusion out of ordering online or over the phone, especially for first time buyers.

Thank you so much for all your help, I love your products . I have got at least 8 of my friends to buy studs from you, cause I kill them off the line and they don't bend or break!

Thanks again! Joe- Hampstead, NH

Just a quick note to thank you for your professionalism and great customer service. You resolved my dilemma timely and I appreciate your help. Please do not hesitate to use me as a reference for any potential customers.

It's rare these days to find such good customer service. Chesire CT