A plastic

Plastic

A plastic material is any of a wide range of synthetic or semi-synthetic organic solids used in the manufacture of industrial products. Plastics are typically polymers of high molecular mass, and may contain other substances to improve performance and/or reduce production costs...

 cord lock (also known as cord fastener, plastic stopper or cord toggle) attaches to drawstrings and tightens without the use of knot

Knot

A knot is a method of fastening or securing linear material such as rope by tying or interweaving. It may consist of a length of one or several segments of rope, string, webbing, twine, strap, or even chain interwoven such that the line can bind to itself or to some other object—the "load"...

s. Cord locks allow mountaineers

Mountaineering

Mountaineering or mountain climbing is the sport, hobby or profession of hiking, skiing, and climbing mountains. While mountaineering began as attempts to reach the highest point of unclimbed mountains it has branched into specialisations that address different aspects of the mountain and consists...

 to fasten clothing and camping equipment quickly in cold conditions when the fingers are encased in heavy gloves. They consist generally of three parts: a barrel, a toggle (plunger), and a spring. Squeezed together, tension is released and the cord lock can move freely up and down the cords. Released, the tension is engaged and the cord lock stays in place. They come in many sizes and shapes to suit to any purpose, including plastic cord lock, mini size cord lock, no spring cord lock, with spring cord lock, with rim cord lock.

Cord fasteners are used in many different applications to retain one or more cord segments or drawstrings in a tightened condition and to release such cord segments when desired. For example, cord locks are used in connection with garments that include drawstrings, such as hooded jacket

Jacket

A jacket is a hip- or waist-length garment for the upper body. A jacket typically has sleeves, and fastens in the front. A jacket is generally lighter, tighter-fitting, and less insulating than a coat, which is outerwear...

s and sweatshirts. Such fasteners are also used on various types of bags such as laundry

Laundry

Laundry is a noun that refers to the act of washing clothing and linens, the place where that washing is done, and/or that which needs to be, is being, or has been laundered...

 bags and other storage bags that utilize cords to temporarily close an open end. They are also used in window blind

Window blind

A window blind is a type of window coverings. There are many different kinds of window blinds, using different systems and materials. A typical window blind is made with slats of fabric, wood, plastic or metal that adjust by rotating from an open position to a closed position by allowing slats to...

s. They vary in size depending on the particular application, from less than 1 inches (25.4 mm) long to 3 inches (76.2 mm) or more.

The original cord lock was invented by Mark J. Krauss in 1986. Cord locks are usually purchased from a haberdashery.