Abstract: A unit is provided for holding instruments and components that are used in dental treatment. The unit can comprise sides, a bottom, and a top that can be modular or integrally formed. The unit can have a drawer-shaped construction and can be made of heat-resistant material. The sides and bottom can form a first rigid unit part, all or part of which can be provided externally with a covering or layer of a non-rigid or flexible material. The covering or layer is arranged to be easy to hold and to have good frictional characteristics. The top can form a rigid second unit part that preferably contains an organized holding arrangement for the instruments and components. Accordingly, the unit can be heat-resistant, robust and easy to hold, and have good frictional characteristics to prevent it sliding on an underlying surface upon which the unit is arranged placed.