I buy these as a cheaper alternative to Bowflex Selectech dumbbell , and long story short I just order a set of Selectech and will be try to sell these or else give they away . they be weight , yes , and they be adjustable . but I find they to be a bit clunky and not very ergonomically appealing . also , the change between weight unless you be do 10 lb increment be time consuming . there be two 2.5 lb weight in the handle , so you have to remove the center handle and remove one or both of they depend on if you want to adjust 2.5 or 5 lb . plus then you have one or both of the 2.5 lb weight to deal with until you put they back in the handle . a bit of a pain in regular use , but especially for I as I use they for p90x and change as quickly as possible be beneficial . they be not bad , I just think there be better alternative out there .