Abstract: A slideholder device contains a handle portion, a rigid thermoplastic body portion and a plurality of metal clip structures. Each clip structure is received within one of the recesses formed along the interior of a sidewall of the body portion. The body portion forms a first combination of aligning elements to hold each clip structure within a recess. The body portion also has elements to directly align slides, especially in the vertical direction. The holder portion can be attached above one or more than one body portion, and can be detachable. The slide assembly includes a plurality of slide pairs, each extending into opposing recesses on opposite sidewalls of a body portion.