Patent ID: 7678031

Claim:
A dumbbell including: a rigid base having first and second opposing sides, the first side being substantially planar and having means for supporting the dumbbell upon a support surface; a pair of flanges fixed to the base and protruding in a first direction outwardly from the second side, each flange having an inner and an opposing outer side; a handle having opposing ends mounted to respective ones of the flanges so as to span between the inner sides; an aperture provided between the handle and the base for receiving the user's fingers; two weights; a complementary elongate tongue and a groove pair by which each weight is releasably fastened to the base, wherein one of the tongue and groove pair is disposed on each weight and the other of the tongue and groove pair is fixed to the base, disposed on the outer side of each flange; and a latch for preventing relative sliding movement between the tongue and groove of each pair.