The Boring Gimlet is used for removing loose objects in the drain line. It easily fits into the female connector on 5/16 in. and 3/8 in. cables. The BG is also available in a variety of cutter sets.Open spring helps grab on to and remove loose objectsUsed on 5/16 in. and 3/8 in. diameter cableEffective in 1-1/2 in. to 3 in. linesCutters are subject to severe wear and are repaired or replaced within one year only if a flaw in the material causes breakageE-coated to protect against rustSimple and easy to use