The LRW2 and LRW3 are tools manufactured by Waycon Company. They are tools used to measure distances and positions. They have restive sensors that work as a voltage divider via a hybrid layer of plastic that are available of a protection class of IP68.
The LRW2 with ball tip have the measurement that ranges from 10 to 150 mm while the LRW3 with bearing tip have the measurement that ranges from 10 to 50 mm