Strip Tube Ruler - By Cozy Quilts Design
This ruler makes half square triangles a breeze by combining brilliant engineering with, "the tube technique." It's perfect to use with strips and even includes directions to make our favorite block from 2-1/2in strips. With this great gadget, you can easily make accurate half square triangles from 1in to 9-1/2in!
See the Patterns I have that use this ruler!!