The Sonnet ExpressCard/34 to 54 Stabilizer is compatible with most ExpressCard/34 cards. This steel bracket clamps to the side of an ExpressCard/34 adapter to make it just wide enough to fit snugly in an ExpressCard/54 slot and prevent free side-to-side movement, providing stability. The ExpressCard/34 to 54 Stabilizer can be easily attached and removed..

Stabilizes an ExpressCard/34 Card in an ExpressCard/54 Slot. Added width helps prevent adapter card from shifting and disconnecting.