The 9.5″ Half Square Triangle Ruler has the Bloc_Loc patented technology channel machined for accuracy underneath 1/8″
clear acrylic. This channel locks the seam allowance in place and allows the quilter to square up a half-square triangle
block in just seconds with ultimate accuracy and safety.
No more “ruler rock” or slipping guaranteed!!
Bloc_Loc rulers have easy to read solid markings throughout every 1/2″ and perimeter markings to 1/8″.