This Electric Screwdriver Set can be used for assembling R/C models and for other DIY purposes. This screwdriver features 21 adjustable torque settings, and the clutch function stops the motor to prevent the screwdriver from damage in the case it faces more torque than the set value. The equiped lock button allows you to use this electric screwdriver in the either the standard pistol shape or straight forms. Also comes with a forward/reverse switch button as well as high/low speed select lever. In addition, the included LED light allows you to clearly see the area you are working on improving your work efficiency. The built-in 7.2V lithium-ion battery can be fully charged in approximately 30 minutes with the included AC100V charger. The set also includes soft case and 5 screwdriver bits which can be easily attached and detached by simply sliding the sleeve.