This is a SHUBB C1 type capo. It's an early model with a Delrin cap and the "PATENTED" stamp. Compared to the current roller type, the early model allows for a more secure hold by tightening the screw. The condition is excellent, with no looseness and a clean appearance. For those looking for a well-maintained early SHUBB capo, what do you think? - Brand: SHUBB - Type: C1 (for acoustic and electric guitars) - Material: Metal and rubber - Function: Adjustable screw to hold down strings Thank you for looking.