Review:
Bought 4, to taking advantage of combiner shipping and they came out to be $5.76 each. Weighed 3 kettelbells, assuming the listed weight is accurate, which they did measure within 1% of the weight label when tested by one of my 20X more expen$ive electronic toona scales.
10# - Weighted 9.99 for a 0.001% error
20# - Weighted 19.9 for a 0.005% error
30# - Weighted 29.7 for a 0.01% error
For < $6 ... I'll take it ...
Other:
They are small and lightweight, but if put into a bag with other stuff the ON button could be pressed easily, so I will find a small box or plastic case to put it in. Size-wise they are about 1/2 the size of a pack of cigarettes, in all dimensions.