Easy to use tool is great for making HST's (Half Square Triangle Units) and hourglass units. This is the tool that I personally use for marking lines on my HST's.

• Mark 1/4-inch sewing lines on patchwork pieces with this nifty set of tools
• It is a quick and easy method for half-square triangles and hourglass units
• Features an acrylic construction with easy to follow black and yellow markings
• Instructions for two patchwork blocks included

See the video below for some instructions on how to use.