These double buret clamps hold two burets from micro to 100ml size. Constructed of chrome plated, zinc-aluminum alloy for durability, the unit is simple to operate -- compress the scissor-like mechanism, insert buret, and release. Numbers and graduations on burets are easy to read. Attach easily to support rods with a convenient hook clamp. Knob for tightening is on the front for easy access. Available in Chrome or White finish.