The sand shields are the side pieces on the front and rear fenders as well as the strip down the side over the tracks . Developed by the British in the desert to try and keep the dust from being thrown up by the tracks , causing a large dust cloud giving away your position . Those bars on the side of the turret are grousers , a kind of traction bar which can be bolted to the track links . ( sort of like studded tires for ice ) Each tank had about 18 - 24 of them to be mounted every 5 or 6 track links . Shermans , Lee / Grants , M 10s , Priests and Stuarts all had them either mounted in racks on the side of the turret or body , or in bins . Only used on the flat pad rubber track .