have be use these with some workout dvd i get , and i could not be happier with this product . replace a complete dumbell set , while take up almost no space . the padded support provide stability when you really push into high rep. i never think i would say this , but i actually prefer these to my old kettle weight and dumbell rack . this be the first product i have actually feel strongly enought about to write a review , so i think it be safe to say that i highly recommend this product .