The MG6K15T40V4 Rocklift will move irregular shapes such as rocks and boulders from 15 to 40 inches in diameter. The Rocklift is a triple tine mechanical grapple that requires no hydraulics to operate. This triple tine rock lifting grapple also excels at picking up brush and debris, especially in hard to reach places such as deep ditches or ravines. This triple tine rock lifting grapple also excels at picking up brush and debris, especially in hard to reach places such as deep ditches or ravines. Mechanical rock lifting tongs are an extremely versatile attachment that allows contractors the ability to make easy work out of otherwise difficult tasks. Height restrictions may apply to boulder lifters so be sure to check proper specs.