SERRATED EDGES DESIGNE- Welded 2-teeth serrated edge design in the backhoe thumb for tractor gives you a better bite on your excavate loose material like rocks, dirt, woods, and other debris. These rigid and stiff teeth grab the building materials tightly into the bucket. ADJUSTABLE POSITIONING- Our excavator thumb kit with precise dimension 12" x 35", equipped. With hydraulic cylinder adding power to. Lbs, flexible in position set, with adjustable angle ranging to. °, it can adjust to various positions to hold the different size of loading materials. EASY TO INSTALL & ...