Stand has no exposed metal parts. Smooth surface means easy clean-up. Extremely stable 30"L rod screws securely into the 8-1/2"W x 16"L, 5.5-lb. base with sturdy tightening knob. Non-corroding Clamps hold burets in place with rubber pads and a concealed steel spring. Clamps hold firmly without obscuring graduations. Center clamp tightens to standard support rod. 1/2" and 3/8" bushings included.