Cat^®Pro Series Hydraulic Thumbs expand the versatility of Cat hydraulic excavators in the 311 through 329 model range and deliver high performance and exacting compatibility with today’s Cat excavators, buckets and couplers. Pro Series thumbs mount on the bucket pin and move along the same arc as the bucket edge, providing solid grip and precision as the bucket curls. The operator controls the thumb independently of the bucket to position it as needed for precise picking, sorting and material placement Continue reading