Our margin guide tool will help you to line up cards and book covers ensuring a consisten margin, just choose the margin dimension you desire, cut the paper according to that dimension and use the correct square tool to ensure perfect alignment. SIZE We offer kits in 2 different lengths: Regular 2in for cards and small applications and a Large 7in for covers and larger applications, each alignment guide tool comes in a kit that contains the following: - Reference square tool. - 1/8" guide square tool. - 1/4" guide square tool. - 1/2" guide square tool. MATERIAL All our tools are made with food safe PLA (Polylactic Acid) made from corn starch. CARE Do not wash in the dishwasher. Do not soak the tools. Use cool or warm water. The tool will melt if exposed to heat. COLOR Color of the tools may be different to the shown in the pictures. DESIGN Every design is designed, manufactured and tested by the Crafty Shop by Sache team.