Bloc Loc Half Square Triangle Ruler How To Video 

Yes! Would love to see this demonstrated by a right handed person.

Mine came that way also. I asked the same question and no one answered me either

@Elaine McAtee I've found there is no need for the blocks to be "quite a bit larger". Many times, I only need to trim two sides of the block. As long as you're lined up to the correct size and everything is straight, that's all you need to do. Don't get hung up on "having" to cut all four sides.

Since no one responded to you and I have the same question, I'll share my observation from the video. First, it looks like the units are made a full inch larger than needed. Second, it looks like she gives a 1/2 inch over the desired finished size for the first cut and then squares up on the second. Since most of us will not end up with units this large, I would suggest that you follow basically the same formula for any squaring up. For me I tend to either be really close to the desired size or maybe a bit under. Assuming that most folks are a tad over, not as much as hers here, just place it to the desired size and trim. I could be wrong as I don't actually own one of these yet but if you are really close to your desired size, it seems to me to look like you would follow the standard rules of any ruler being used to square up. This one just keeps you from slipping and makes it super easy for trimming both sides without having to lift the ruler and re-position. Hope this helps!

The ruler shows you that you are over on the bottom as well. I saw it done at a show as I thought the same thing but it was easy

+Karen Edmondson - You may have already found out how, but in case you didn't, Here are a couple of YT videos that show how to use this ruler if you are right-handed: “Bloc Loc HST Video”, ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-sNSZ3RetStU.html, or try this one: “Half Square Triangles Using Bloc Loc”, ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-Ff-Kj24Y6-Y.html

Rotary cutter

It needs that slight ridge to lock on. I tried it with an open seam but not the same

@gilda garbutt wyer They are not overly expensive here in the U.S. Maybe your could find another vendor and order one.

I found one on Amazon but it was still silly money. £80 or so. For a bit of plastic. Just say in’.

That's the story of my life being a lefty!!!!

+Debbie Klapmeier - Here are a couple of YT videos that show how to use this ruler if you are right-handed: “Bloc Loc HST Video”, ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-sNSZ3RetStU.html, or try this one: “Half Square Triangles Using Bloc Loc”, ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-Ff-Kj24Y6-Y.html

Now you know how us lefties feel hahaha