This model is used to give mason jar lids a place to live that doesn't take up counter or cabinet shelf space. This model has 3 countersunk 4mm (.157in) diameter holes for screws or can simply be adhered to a wall or cabinet door with sticky tack. I personally used gorilla mounting putty and it holds up great. An additional document will be included in the .zip file that gives more information on best settings when printing this model and any extras tips. Any questions before or after download can be sent to ask.rich.3d@gmail.com.