When multi-tasking is a must, the AMI Attachments Jawbone 4-in-1 Excavator Bucket responds with a multi-purpose design that digs, grades, grips and clamshells. At first glance, the AMI Jawbone excavator bucket looks no different than a regular digging bucket, however inside the crossbar is a powerful hydraulic rotary actuator. This provides all the power of a hydraulic cylinder-style thumb but without custom installation.