JP Enterprises Shim Piece for Elevation Adjustment, 1 Degree is a part of the high quality and dependable Riflescope Mounts and Bases from JP Enterprises. All of the features you need for a price you want. Riflescope Mounts and Bases from JP Enterprises are well known for their quality and JP Enterprises Shim Piece for Elevation Adjustment, 1 Degree upholds that standard.