Bloc-Loc Half Square Triangle Ruler - 4 1/2 x 4 1/2 inch
is on back order
Great new rulers just in stock which allow you to EASILY and QUICKLY trim your half square triangle blocks. The 41/2 inch square ruler locks into place on your 45 degree seam line and allows accurate trimming to your desired finished HST size. This ruler allows you to trim HSTs to the any finished size smaller than the ruler itself!
Have a look at http://blocloc.com/rulers/ for some great video guides on how to use these clever little rulers