The inlaid sights on the the rails of Olhausen pool table are not just for decoration!
These are important sighting marks, and are meant to improve the accuracy of your, especially bank shots. They are commonly called ‘diamonds, no matter what shape they actually are.
They help you to take advantage of the common geometry shared by all regulation pool tables, to aid you in banking a shot off of multiple rails.
The diamonds form invisible lines on a table, which go from diamond to diamond; from left to right. The general principle is if you hit the cue ball perfectly straight at one diamond, it will travel straight back towards the diamonds at the opposite end of the table.
When used properly, you can calculate or visualize the precise impact point to send the cue ball (or object ball) to any other spot on the pool table.
Sound complicated? It is a little bit but like most things with pool and billiards, it just takes a bit of time and practice before it feels natural.