Super cool and apparently the first double pedal ever made! This is a Zalmer Twin Pedal made by Sleishman. It's cast aluminum with a flexible spring connecting rod. It is missing a flat metal connecting piece which stabilizes slave side pedal. Still is 100% functioning. Shows signs of use and age with light scratches, rust, and pitting. Due to its design, foot boards on both pedals have slight side to side play. Connecting spring attaches on ball bearing which holds snugly on both sides. Hoop clamp functions great! Slave pedal could technically be used as a single pedal as it also has a hoop clamp. Beaters have been changed to Pearl. One of them is very worn. The other has plenty of felt left! Unique looking pedal! See the pictures for more details!