A surgical instrument designed to apply surgical staples to tissue in the anal canal to treat haemorrhoids, particularly the procedure for prolapse and haemorrhoids (PPH) [repositioning of the anal canal mucosa to reduce blood flow to internal haemorrhoids]. It is typically pistol-like in design with a rounded, cylindrical head loaded with staples at the distal end, and operating levers at the proximal end intended to deliver a circular band(s) of staples, whilst cutting away hemorrhoidal tissue. It may include disposable supportive devices intended to assist the procedure (e.g., rectal dilator, anoscope). This is a reusable device intended to be sterilized prior to use.