Haven't had a time to use them but look like good quality

Just what you need though the whole process to help you get a flat smooth finish.

Hello Guys and Gals!
If you're looking for that one cutting edge piece of trick kit to get your work to that all illusive higher level, you need NOT look any further! With (1) 8" flex block, (1) 12" flex block, (1) 12" ultra flex block and (1) 18" flex block you can NOT go wrong with "The Linear Blocking Tools - Starter Set." In my opinion "Starting Here" is a no brainer, even if you have 40+ years in the business it's a GREAT place to START! Colten has thought this bit of "Kit" out well to blanket cover what one would need to virtually do the majority to get your work STRAIGHT! You will be amazed at the ease it takes to hand sand properly with these blocks. A lot less time is needed which saves shop hours dramatically which means quicker turnarounds or more business. I have arthritis bad and find these blocks great to use after years of abuse in the shops. I will only strongly recommend the "Stick It" adhesive type paper blocks for super straight incredible finishes. Much like Foam, or Rubber blocks your "HOOK & LOOP" will also give and not make things completely laser smooth. If you are like me and do everything by hand and or lots of sculpting the Hook & Loop would surely have a place in the immediate "Knock it Down" process of leveling filler, fiberglass or custom sculpting to "Rough-Out" your work quickly (much like you would a Cheese Grater without the large gouging incidents ;o) with a 40 or 80 Grit Paper. I would then go (and stick) to only the Sticky Blocks for all else if you're striving for perfection.
After 40 + years of doing many custom body jobs and working on several educational programs and instruction in Vocational Campuses in N.Y.S. in and around my area, and being selected as a NYS Vocational Judge after a couple of Award winning years entitled me to Judge the best of the best in the state and award a full scholarship to the One Student who showed the best of abilities in all areas of the Autobody business, I can tell you there is no better block to work and familiarize yourself with! Get this set, Get ready, and Go for amazingly better results overnight, guaranteed! Once you start, you can then diversify and pick up the "More Specific Blocking Tools" for what you need for perfecting your craft. God Bless and Best Regards to you all and "Never Stop Learning!"
**As an adder, I am proud of Colten and his many instructional videos!! He has great in-depth information and I especially love the fact he explains the Primer, Filler, and Poly "Gassing out" properties and why we should EPOXY! Use your PPG products accordingly and Baking Panel Temps! He is a wonderful instructor as is his many "Guest Instructors!" If you are interested in the Vocational or Educational aspects of the business sign up and attend one of "Linear Blocking Tools" courses, you can learn much from this man.

So far I haven't had a chance to use it much but for when I have used it,it has been Great. Thank you

Fairly new to bodywork, thought I would give these a try as I was impressed with what I saw on YouTube. I’ve only done a couple of small test areas but so far the product seems to work fine. I am impressed with the quality of the blocks. Will buy more I’m sure.