Instrument is a metal rectangular box with a rounded top with two extensions on the long sides. The box has a brass bottom that is held on with four screws. Along the bottom edge of the box are eight screws at the corners. On one of the short sides is a single thumb screw. On the other short side are two thumb screws and a key turn. The top of the box has a protrusion and metal blade that holds in a shaft with three bras rollers on it. This shaft sits in a carriage. A y shaped fork with a wire top comes out of the box in one corner. On one of the long sides is a removable extension that is a carriage for a removable roller. The other long side has a single extension which ends in a brass L. The L is held on with a brass thumb screw. On the L are two brass discs, also held in with brass thumb screws. The discs are hollow and open at one end. The have brass platforms mounted above the open side which hold shafts with thin pieces of brass over the openings. They also have tube spigots. One of the spigots is attached to a rubber tube that ends in a stainless metal cup that is shaped like a 3/4 moon.