TIN CHIRRA OFFICER KHUKURI (KUKRI) This khukuri has three fuller, so it’s named “tin”(Three) chirra (fuller).”TIN CHIRRA”. This khukuri is designed and based on Gurkha officer tin chirra khukuri, it was made for serious duty and for combat close quarters. it is fantastic design for war and domestic use, a very unique and rare khukuri. Fullers are often called “Blood grooves” or blood gutters . from the engineering point of view however, a blade with high quality steel, hardened and tempered in an appropriate manner, on which has been practiced a fuller can be from 25%to 35% lighter compared to the same blade , strength or integrity normally the fuller had two main function, lighten and stiffen the blade.