Features 

1) 18+1 Torque settings:

Its 18 torque settings allow you to adjust torque as desired. Lower torque settings mean low force is applied. Like if you are drilling and want to drill only a bit then select torque from 1-5, it will be enough to drill. But if you desire to drill deeper and in a solid and tough surface like wood or metal, then you need to apply more torque so that drill bit infiltrate with ease and accurately. Usually, higher torque means more force is applied and this helps in drilling deeper with ease. 

2) Forward/Reverse Button:

It also has a Forward/Reverse button which allows you to rotate drill bit in both clockwise and anticlockwise directions. This feature is usually provided to install and extract screws.

3) Variable speed Trigger:

Generally, this cordless drill provides two speeds. Speed 1 from 0-350RPMs & Speed 2 from 0-1350RPMs. 

4) Contains LED Light:

Led light is necessary in cordless drills as it does not allow dark in working field specifically at the point where drilling is being done.

USAGE

1) Use to Drill Woods & Plastics. Also, can drive in/out screws:

This Deko pro 20V cordless can be used for lightweight-mediumweight tasks. It provides 354in-lbs of torque which is good enough.

Conclusion:

Cordless Drills mentioned above are one of the most Ranked Cordless Drills. Cordless Drill's Selection requires many parameters like Torque, Speed, Battery capacity, Price & Drilling capacity. 

Clearly, for a person with no price issues, go for Dewalt Cordless Drill as it provides best Torque and highest RPMs. Its only drawback is its price as it is most expensive in the list.

While Black+Decker, Dekopro & Avidpower provide cost effective cordless drills & if we discuss them one by one, we see that dekopro drill is most cost effective with more RPMs then Black+Decker & Avidpower but delivers very less Torque. On the other Hand, Avidpower & Black+Decker compete well, both provide better RPMs & Torque, & Clearly Black+Decker has more RPMs & Torque. 

Among all, Dewalt is the most Preferable one, and apart from Dewalt it is a bit tough to say which one is better as the three remaining brands compete well. But overall, it is Avidpower which has most balanced features then dekopro & Black+Decker.