The Lineloc 3 is a ladder lock for cord instead of webbing. It creates an easy way to adjust and keep cord taut. It laces and functions just like a standard ladder lock would with webbing. You just pull the cord to tighten, lift the ergonomically designed thumb tab to release. The removable line loc 3 can be easily attached to webbing and removed. It will accommodate cord from 2.5 mm to 3 mm (3/32" to 1/8"). Great for ultra-lightweight guylines.