Bladers shorten part names into two- or three-letter codes when they write out a combination, and the shorthand differs by generation. Plastic-generation combos reference the Bit Chip, Attack Ring, Weight Disk and several other pieces this way, Hard Metal System combos use a related but distinct set of codes, and Metal Fight Beyblade combos abbreviate Face Bolts, Fusion Wheels and Energy Rings by their own letters.