A selectorized dumbbell has a handle that can be inserted into a gap
between stacks of nested left and right weight plates that are provided
in a plurality of nested weights. A selector determines how many left
weight plates are coupled to the left end of the handle and how many
right weight plates are coupled to the right end of the handle. A single
left weight plate and a single right weight plate are interconnected
together by an interconnection member of some type to form a single
weight. The interconnection members of the different weights overlie one
another and are provided with two arrays of a plurality of unique sets of
holes and slots. A first connecting pin is inserted through the handle
and through a selected set of holes and slots in the first array. A
second connecting pin is inserted through the handle and through a
selected set of holes and slots in the second array. The two pins
together symmetrically couple the desired number of weights to the handle
in a balanced fashion.