Tool is a device or implement that is designed for a specific purpose and has indeed become a part and parcel of our lives. Tools facilitate quicker completion of jobs and ensure good results. Tools are of two types – hand tools and power tools. Hand tools are used to perform a particular task using solely manual labour but power tools are mechanical devices that operate when they are activated by an external power source. The external power source may be batteries, electricity, compressed air, burning of fuels or propellants. Power tools can be either stationary or portable in nature. Continue reading