4.5" HDII - ENDLESS Cutting + Grinding Wheel
4.5" HDII - ENDLESS Cutting + Grinding Wheel
Using a 4.5 inch HDII to Cut Metal, Point Concrete Blocks, Grind Stone, and Cut Plastics
4.5" HDII - ENDLESS Cutting + Grinding Wheel
Bad Dog HDII Review Video preview image
4.5" HDII - ENDLESS Cutting + Grinding Wheel
4.5" HDII - ENDLESS Cutting + Grinding Wheel
4.5" HDII - ENDLESS Cutting + Grinding Wheel
4.5" HDII - ENDLESS Cutting + Grinding Wheel
4.5" HDII - ENDLESS Cutting + Grinding Wheel
4.5" HDII - ENDLESS Cutting + Grinding Wheel

4.5″ HDII – ENDLESS Cutting + Grinding Wheel

The Original HDII, still our best selling and versatile wheel. Whether you have to Cut, Sand, Grind or Sharpen the 4.5″ HDII will do it all.


  • Cut, Sand, and Grind with the same wheel.
  • Diamond Grit is applied to the surface and edges for ultimate versatility.
  • Use on almost any material from Masonry to Metal and PVC to Porcelain.
  • Safe! Steel core means the wheel won’t explode like a fiberglass wheel if it binds up when cutting
  • Lifetime guarantee. If you wear out or damage this wheel we will replace it, no questions asked
  • Available in 5/8″ and 7/8″ arbor

Use 4.5″ HDII on an Angle Grinder – Not Included.

(10 customer reviews)


SKU: 639843331172 Category:

10 reviews for 4.5″ HDII – ENDLESS Cutting + Grinding Wheel

  1. Michael Rogers

    i bought this 2 years ago misplaced it for over a year but have not been able to use on my makita, dewalt or ryobi too big for shaft cant get a response for adapter to even use it very disapointing

    • The Dog

      Hi Michael,

      We’re sorry to hear that you’re having trouble with the arbor hole size of your HDII. Give us a call at 800-252-1330 and we’re happy to talk through how to get you up and running correctly.

      The Dog

  2. JB

    My son and I work in the marine industry and just last week I used the HDII for the first time. i had a damaged fiberglass hood that required major repair. I used the wheel to first cut out the damaged area and after the initial buildup of glass used the flat side to shape the bracket posts, didn’t clog at all and cut very fast without binding.
    My son could not get a U Joint cross out of an outdrive input shaft so I had him try the disk using only the edge to cut thru the hardened cross…. 4 mins later it was cut clean.
    We will be using it a lot more and I will order the cupped version..
    Will update as I come across more uses that are challenging to us in the field…

  3. Mike Travis

    Can’t say enough good things about this wheel! I’m a hobbiest blacksmith, and do some light metal fabrication work, vehicles, around the house, art projects, etc. I admit, I was skeptical. Grinding with a cutoff wheel? YGBSM!?!? Well I’m here to tell you – it works! My wife bought me one for Christmas and it works! Way better than a standard cutoff wheel. You can cut faster, grind, do things you would never do with a standard cutoff wheel. I’m a pilot for my day job and I’m paranoid about protecting my eyes. I’ve been using the heck out of this thing for a while now and it still looks shiny and new! I love it. I’m buying it for gifts for all my friends that do metal work. One of those rare products these days that performs exactly as advertised! Thanks Bad Dog Tools!!!

  4. Richard C., RI

    This is a great product. I don’t know how I could ever get along without it. So many projects, so many uses- AWESOME! It’s actually the best Christmas gift I ever received (from my wife).

  5. Robert P

    Bought this a few yrs ago at the BigE after buying the saw blade OMG I cut through everything I have this one and just picked up the smaller one for tight spaces

  6. Twah

    I’ve cut hundreds of feet of steel for projects. Grinded hundreds of welds. Cut stone and concrete blocks without issue! Best cutting tool you can buy!! Some of the best money I’ve ever spent. Saved so much over the old style cutoff wheels

  7. jim s

    admittedly I have not purchased the hd-2, I was looking at it and it looks to be a quality disc and would be a handy tool to have but the price for a 4.5 in disc seems to be ridiculously high,just no way in my mind to justify that price,I guess I will stick with the plain old handy disc,I can by several for the same cost,I have a feeling that many have the same view as myself.

  8. Tile God Malcolm

    You’re wrong Jim, more discs are not better. Take it from someone who used to run through a 4.5 diamond disc a week and after the first time you miter a pair of 24×48 the porcelain hogs it cut like an old blade. This blade cuts miles, I mean it man miles like it’s new. Metabo variable speed with CED dust shroud with guide all day no more wet saws my friend. I’m serious! Montolit P3 snapper and a metabo with this blade!! Don’t be scared to change you life people.

  9. Stein Erik

    I just had a friend buy this for me in the US and send it in the mail. Turned out that shipping and customs almost doubled the total, but still; I’m happy with it. It does a fantastic job on literally anything.

  10. Bruce Paustian

    This wheel impressed the hell out of me. Can cut, grind and gouge welds out with a lot less mess than a torch makes.

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