Made of sturdy aluminum alloy material by anodic oxidation treatment, laser engraving R10 R15 & R20 R30 & R25 R35 would not fade, this radius jig router templates is rustproof, dustproof and durable. Package includes 3 different radians of radius templates with each diagonal are R10 / R15 & R20 / R30 & R25 / R35 respectively, which could meet your measuring requirements to make various sizes of roundness radians. Appliable to various of board to cut perfect outside radiuses, it would help carpenters easily and skillfully to make beautiful and rounded radian, such as photo frame edges, table & chair edge or corner, the triming of corner or wood panel, etc. Each size of template is 80mm x 80mm x 19mm / 3.15" x 3.15" x 0.75", weight is 121g, packed into a box with foam inserted, lightweight, safe and portable. R10 = radius 10mm= 0.3937 3/8", R15 = radius 15mm=0.5906 9/16", R20 = 0.7874 3/4", R30 = 1.1811 1-3/16", R25 = 0.9843 1", R35 = 1.3780 1-3/8", cut ideal radiuses with these! Convenient and easy to use, just select the template corner you wanted to make, and put it onto the decided corner of wood. Note: please do not use it on too thin boards.