There are several types of shower drain strainers. A threaded strainer features a base that is threaded like a screw and is of higher quality than other strainers. Remove threaded strainers using a specialised strainer wrench or pliers featuring handle grips that slide inside the strainer. Another type of strainer features clips at the base to hold it into place. Determine if a strainer is the "pop-off" type by looking for indentations located around its outer lip. Remove this type of stainer by slipping a screwdriver or pliers into the strainer grate and pulling it out.
Grasp the pliers and spread the handle grips apart.
Insert the pliers' handle grips into the drain strainer to form an upside down "V" shape.
Turn the pliers in a counterclockwise direction to loosen and remove the strainer.
Stop turning the strainer if you determine that it is not threaded into place.
Slide the tip of a slotted screwdriver under the outer lip of a non-threaded strainer. Twist the slotted screwdriver to pop the strainer up. Remove the strainer from the drain.
If using a strainer wrench, push the slotted end into the drain and turn it counterclockwise with the attached handle.