Ripper tooth is an attachment with long angled tooth that fits on Hydraulic Excavator to penetrate and loosen subsurface layers of earth to a depth of up to 3 ft (approx. 1 m).These attachments are used for loosening layers of frozen soil, rock (usually of medium strength), and artificial surfaces in layers using the tractive force of a prime mover. Rippers are used in construction together with other excavating machines to prepare foundation pits, canals, and trenches.