This model is used to keep children from opening cabinet doors. It’s a very simple but functional design. The two holes for mounting have a 4.5mm (.177in) diameter. It is best to predrill the holes to keep the wood from backing out of the hole and cracking the print. Also be sure not to overtighten the screws to avoid cracking the print. This model has two versions – the “right” version is used for cabinet doors opened with your right hand, and the “left” version is used for cabinet doors opened with your left hand. The angle at which the child lock meets the cabinet frame varies between versions. An additional document will be included in the .zip file that gives more information on best settings when printing this model and any other necessary information. Any questions before or after download can be sent to ask.rich.3d@gmail.com.