MATERIAL STRENGTH: Copper crimp sleeve construction ensures maximum strength and durability when used for securing fishing leaders and wire crimps for fishing line. COMPATIBILITY: Crimp sleeves for fishing line can be fitted to various types of lines, including wire, monofilament, and other materials for various fishing applications. INSIDE DIAMETER: With an internal diameter wide enough for mono and larger diameter lines, these AFW crimp sleeves are perfect for creating fishing leaders for both freshwater and saltwater. EASY TO USE: Simply insert the braid or leader into the AFW crimp sleeve ensuring the line is fully inserted and squeeze with needle nose pliers or similar tool to create a tight, secure connection. CHOOSE THE BEST FISHING CRIMP SLEEVE SIZE: When determining fishing crimps sleeve size, choose a size with an inside diameter of more than twice the wire/fishing line diameter you are crimping., Manufacturer: American Fishing Wire