This is the Koah Mid Handle Plus Fatback Series Wood Teak Speargun Features: Mid-Handle PLUS Remote Trigger (13 from butt of gun) Band diameter: 5/16" - 3 5/8" Big Body Style option available in 54", 57", and 60" spearguns KOAH Mid Handle and Rear Handle plus spearguns were built to maximize band stretch by utilizing the entire stock of the speargun. This is accomplished by moving the trigger mechanism to the rear of the gun and adding a remote trigger and push rod to control the mechanism from a more forward position. This allows you to get the maximum power in a smaller package. For example, a 50in Rear handle plus would have the equivalent band stretch and shaft of a 54 standard. The Mid Handle&';s unique handle position allows spearfishermen to pivot and swing the gun with little effort for fish that catch you off guard or are on the run.