These are 1/4-20 threaded, and are designed to be used with many popular LiPo sleds used in high end FE RC Boats. These are made from billet 6061 aluminum, and are anodized. They are roughly 3/4” tall and have a deep knurl for better finger grip in tight areas. They also feature a 14mm hex head to tighten the nuts with a wrench if desired. Sold in pairs. Comes in two different anodized colors, silver or black.