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Rockripper Drywall Square

A professional drywall contractor probably won’t need Johnson Level’s Rockripper drywall scoring square, but the DIY’er that only occasionally hangs a few sheets of drywall might find it useful. Perforations every 1/16″ in the blade accept a utility knife point for scoring. This makes ripping drywall much easier and more accurate for those of us who haven’t mastered the skill.

This 24″ T-square features a 1/8″ thick tempered-aluminum blade anodized for corrosion protection. Johnson Level screens large black graduations every 1/8″ on the blade and thermally bonds the markings. They foam-mold the head from high-impact plastic that slides easily against the drywall.

A round handgrip in the center of the head and guides to either side help you keep the square on the drywall as you score. For those of us who constantly misplace our tools, the Rockripper’s orange color makes it easy to find on the job site.

Johnson Level suggests a retail price of $33 for the Rockripper drywall scoring square, but street pricing starts at $20.

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6 Responses to Accurately Rip Drywall With The Rockripper

  1. lon bordin says:

    I have one… love it. Works great you can also use it to make lines, etc.

  2. Blair says:

    Usually just use a tape for this, hold the body at the edge measure out how long to cut, and hold the blade of the knife against the end of the tape. Slide the whole tape horizontally.

    The only time we use squares is for vertical cuts, or layouts on tricky pieces.

    I wonder if the holes being spaced every 16th inch would be big enough to accept even the tip of the knife?

  3. alan says:

    I’ll second Blair’s comment. If you don’t own a drywall square you might as well get this one, I suppose, but longways cuts just aren’t that hard using a tape in the manner described. Also, a drywal tool marked in sixteenths is a bit of overkill. If you are attempting to measure that accurately you can pretty much depend on your pieces being over size.

  4. fred says:

    One key to rocking is to try to make as few cuts as possible. As an example, we do a lot of work with 9 foot ceilings – so we get oversized boards 54 x 10 or 54 x 12 deliverred to the jobsite. This reduces the number of joints.

  5. Shopmonger (aka Donny B) says:

    Like the post said pros may not need this but for those who don’t do this on a daily basis, this sounds great.

  6. BobboMax Fankhauser says:

    The RockRipper isn’t for pros- if you can’t rip with a tape, you’re a semi-pro at best.

    That said, it’s a great tool for skilled amateurs and semi-pros. I always take mine when I’m helping at Habitat for Humanity- it helps the amateurs feel good about their work.

    Ref an earlier question, yeah, it would be nice if the slots were a bit bigger, but it works fine as it is. It might get too floppy if the slots were longer.

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