This is a Mechanical Thumb 8" wide x 30" long. Made from Top Quality AR400 Steel with a 100% Warranty. It is made for Machines weighing between 5000-10,000 lbs ( mini excavators). It comes with the Base Plate, Stiff Arm, and pins. This is a weld on Style. It is made Heavy Duty for all types of work. call East Attachments in Winston Salem, NC for details.