The REL-117STM double acting hydraulic spearing tool was designed to drive a piercing blade into the conductor or joint ensuring that the conductor is out of service prior to beginning work. Designed to accommodate electrical cables from 3" to 6" O.D. This double acting tool has the ability to advance and retract, eliminating hang-up. A specially designed piercing blade guarantees contact when a multi-bundled conductor is spiked. Designed for cables & splices from 3 to 6 inch O.D.