Ring binder mechanism having snap-in ring members

A ring mechanism for holding loose-leaf pages, the mechanism comprising:

• an elongate body made of a moldable polymeric material;
• rings for holding the loose-leaf pages, each ring including a first ring member and a second ring member, the first ring members being movable relative to the housing and the second ring members between a closed position and an open position, in the closed position the first and second ring members forming a substantially continuous, closed loop for allowing loose-leaf pages retained by the rings to be moved along the rings from one ring member to the other, and in the open position the first and second ring members forming a discontinuous, open loop for adding or removing loose-leaf pages from the rings,
• wherein at least one ring member for each ring is a separately formed ring member and comprises a ring portion and an anchor connected to the ring portion, said at least one separately formed ring member being formed separately from the body and formed separately from the other ring members, the anchor of said at least one separately formed ring member being secured to the body for pivoting movement relative to the body.