If you have purchased some ABS poker chips in the past few years, it is very likely that these chips are 11.5 gram chips. This weight seems to be the most common weight of poker chip in the home market. Nearly every version of poker chips in this weight class has a type of metal washer engineered into the center of each chip. These metals discs are for weight, but have nice side benefits. A couple of added benefits are durability and strength. The added strength allows these poker chips to endure the hot stamping customization process.