Engineering Toolbox is an easy rule, intuitive, powerful and fully adjustable to the size of the mechanical joints with bolts and keys, on the Metric and Whitworth standards.Available in english and italian.DATA BOLTING CALCULATORAll Metric System size of bolts useful for designing, work, install in electronic sliding rule easy and quick to use.THREAD DIMENSIONAll sizes of threads and their characteristics in a simple slide rule suitable for all professional user in the industrial sector.KEYS TOOLAll dimensions of keys and their sizes in a simple slide rule suitable for all professional user in the industrial sector.NOTESAll contents are approximate and can not be used without being validated by a professional Engineer. Action! srl declines any liability you may incur as result of using this application. Help us to improve this app: please suggest us new tool and malfunctions occurred during the use, writing to [email protected]