These connecting chain attachment links, also known as K-links, are perfect for securing components that need movement to a chain. These versions were specifically designed by AndyMark to interface with common FRC and FTC products. The #35 chain version is designed for #10 hardware on a 1 in. hole spacing. The #25 chain version is designed for #6 hardware with 16 mm (5/8 in.) hole spacing or #10 hardware on a 1 in. hole spacing. Each version makes it much easier to interface chain to elevator systems than ever before. They can also be used in conveyor systems to move items around inside your robot.