This pool ball triangle is a step above most regular racks. It is made from maple, a more durable wood than most others. Plus, it has three sliders on the bottom which make it easier to slide back and forth on the table, helping you to make a tighter rack of balls. Plus, the gliders keep the wood off the pool table cloth, eliminating any chance of a splinter pulling at or tearing your cloth. This triangle is for standard, regulation-size 2-1/4" pool balls.