Adjustable Ruler with Radius Arc Measurement - Acu-Arc (Centimeters)<div style="text-align: left;"><strong>[Product Information]</strong><ul><li id="replacementPartsFitmentBullet" class="aok-hidden" data-doesntfitmessage="We're not sure this item fits your " data-fitsmessage="This fits your "><span class="a-list-item"><span id="replacementPartsFitmentBulletInner"><a href="#" class="a-link-normal hsx-rpp-fitment-focus">Enter your model number</a>to make sure this fits.</span></span></li><li><span class="a-list-item"> Centimeters </span></li><li><span class="a-list-item"> A ruler that eliminates the need for a beam compass or expensive curve sets </span></li><li><span class="a-list-item"> Can be adjusted to any radius， from 7.88 in. to 200 in. (17 cm. to 500 cm.) </span></li><li><span class="a-list-item"> Can be used to determine the radius of an existing curve for dimension drawings </span></li><li><span class="a-list-item"> Find center lines &amp; center points or determine what a curve must be to fair in existing points or lines on a drawing </span></li></ul></div><img src="http://ecx.images-amazon.com/images/I/31t636vS8qL.jpg" noproxy>