This listing is for four 5kg polyethylene plates, totaling 20kg. They will NOT fit 28mm shafts! Please confirm this before purchasing. The 5kg Irotec plates in the photo are for size reference only and are NOT included in the sale! These plates will fit 23-25mm shafts! Recently, many 2-way type polyethylene shafts are thinner, and generally, shafts from manufacturers like Irotec are usually 28mm, so these plates will not fit. Please make your own judgment before purchasing. Keywords: Irotec, Wild Fit, Fighting Road, home training, trainee, training, muscle training.