Speargun Bands are the power behind the spear gun. Most speargun bands are made from different forms of rubber which offer an elasticity allowing the bands to be stretched and spring back launching the shaft from the speargun. Sometimes referred to as speargun slings or power bands, the bands used to power spear guns are available in a range of thicknesses and should be configured in the proper length for the size of the speargun. These bands for spearguns can be designed with a variety of different types of wishbones from metal to corded materials, with each having it's reason for use. Alot of European style spearguns are designed with some type of articulated stainless steel wishbone to offer a locking contact with the speargun shaft and durability. Others use a type of wishbone made from a corded material such as spectra or dyneema line. Corded wishbones may have to be replaced from time to time (which is relatively cheap to do) but are seen by many spear fisherman as safer alternative to handling metal wishbones in the water.