# Any fresh tips on rectangular holes for project cases? **URL:** \ **Category:** General Electronics\ **Created:** [July 15, 2023, 8:58am UTC](https://forum.arduino.cc/t/any-fresh-tips-on-rectangular-holes-for-project-cases/1148283 "2023-07-15T08:58:28Z")\ **Posts on this page:** 1\ **Showing post:** 25
**Author:** ![LarryD](https://dub1.discourse-cdn.com/arduino/user_avatar/forum.arduino.cc/larryd/32/215550_2.png) [@LarryD](https://forum.arduino.cc/u/LarryD)\ **Post date:** [July 15, 2023, 4:41pm UTC](https://forum.arduino.cc/t/any-fresh-tips-on-rectangular-holes-for-project-cases/1148283/25 "2023-07-15T16:41:13Z")
You do need a good sharp (new) file dedicated to this one job. Do not use this file on anything other than plastic as filing metal dulls it and makes it less effective. The process should only take 10-20 minutes. * * * If you have access to a CNC machine, things are much easier and 10 times faster. > [@Share tips you have come across](https://forum.arduino.cc/t/share-tips-you-have-come-across/428745/1038): > > Mounting Components in a Project Enclosure. The following discussion should help makers in placing and mounting components in a project enclosure. Refer to earlier posts on cutting and making holes for these components. A digital caliper is a must have tool when transferring component dimensions to your CAD drawing. ![C](https://europe1.discourse-cdn.com/arduino/original/4X/9/4/5/94570cd526d23a7b2e6a4a1c8f54b11bc58fe823.jpeg) ![I](https://europe1.discourse-cdn.com/arduino/original/4X/1/6/2/162df479f597c5d904e90aefa3130f1c38d724a2.jpeg) ![J](https://europe1.discourse-cdn.com/arduino/original/4X/a/2/9/a29d52aeb95cc2a66bf8bc1149b26b1f8b7291b5.jpeg) * * * > [@Share tips you have come across](https://forum.arduino.cc/t/share-tips-you-have-come-across/428745/134): > > . ![Five](https://europe1.discourse-cdn.com/arduino/original/4X/e/d/2/ed2f1e74e412355908a2cc767fa2ebdf791ff3c7.jpeg) --- _[View the full topic](https://forum.arduino.cc/t/any-fresh-tips-on-rectangular-holes-for-project-cases/1148283)._