IROTEC dumbbell shafts, 2 pieces 45cm semi-long type Screw collars, 4 pieces Rubber packing, 4 pieces, all included. Standard dumbbell shafts are 40cm, so with the 45cm ones, you can add two 2.5kg plates and one 5kg plate. If you remove the rubber cover, I think you can attach five 5kg plates on one side. This is convenient for people who need more weight.