Staedtler Masterbow Comfort Student Compass for Circles To 10.25 Inch Diameter， Lead and Pouch 951-40-wp<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"> Prevents unintended setting adjustments </span></li><li><span class="a-list-item"> Maximum circle diameter is 10-3/8'' (265 mm) </span></li><li><span class="a-list-item"> Includes a spare lead tube and comes in a plastic wallet </span></li><li><span class="a-list-item"> Size: 3-1/4"W x 1/2"D x 7-1/2"L </span></li></ul></div><img src="http://ecx.images-amazon.com/images/I/31It3iC%2BTNL.jpg" noproxy>