Very good router plate. If you follow instructions you can mount this plate with dead-on accuracy. I bought the centering system designed by Rousseau for $6 (<a data-hook="product-link-linked" class="a-link-normal" href="/Rousseau-39-1024-Router-Base-Plate-Centering-System/dp/B000J3GP52/ref=cm_cr_arp_d_rvw_txt?ie=UTF8">Rousseau 39-1024 Router Base Plate Centering System</a>&nbsp;available on Amazon) and I would recommend that you purchase this accessory as well. It made it easy to install. The plate is machined well and fits perfectly. The 'snugging' corners work well and provide a solid secure fit. The center rings are not a problem to snap in or out. You want them tight, so I would expect to use some pressure to remove.