Task: On the Alibaba.com app, look for hammer drills under the drill type category.
Steps:
go back to the previous page 
go back to the previous page 
Click on the Filter icon at the top right corner of the screen
Swipe up for Drill Type
Swipe up for Drill Type
Click on the drop down icon of Drill type
click on the check box of Hammer drill
Click on Show results option at the bottom of the screen
Click on Show results option at the bottom of the screen