You can find the same weights in the craft store for only β the price. The packaging is heavy, but the weights work great when building the model. steel weights. Just place them perfectly by holding them with a small pencil sized magnet. Easy to remove by cutting off the backing with a cross cutter. There is a thin plastic tape at the top of each strip that I removed before cutting. The backing paper can be difficult to remove to reveal the adhesive, but again, an x-acto knife will do the job.