A device for holding a specimen holder, the device including a body with a slot formed therein. The slot includes an interior for receiving the specimen holder which may be a flat disk with edges and a pair of opposing sides. The disk may be made of a resilient deformable material. The slot may be sized to receive the specimen holder through an open top end and may taper from top bottom, such that the bottom end of the slot is smaller than the specimen holder. The slot further configured to contact the specimen holder along edges of the specimen holder and to allow some sideways deformation of the specimen holder without either side of the specimen holder distant from the edges coming into contact with the interior of the slot.
