Buying Screw Gun can screw you if you don't follow this. There are impact drivers and cordless drivers. 

Whom should you focus?

Impact Drivers Vs Cordless Drivers

Well, I will tell you whom should you focus right now. There are many types of drivers which helps us consumer to use them for different type of use. Well, If you want more wireless and don't want any kind of headache then you must go for Cordless drivers. 

Cordless drivers are the best drivers as they don't use any kind of wires to be messing around. All you have to do is just follow them and use those driverss

Impact drivers on the other hand are the ones who always push themselfes for the wire and they will always mess up. However, they provide good electricity flow and they don't use any kind of battery so if cordless drivers has battery issues then it will be a big issues. 

But I am not the expert but you can get expert advise. 

Just Go there: Impact Drivers Vs Cordless Drivers