Shark RV2100AE Navigator Robot Vacuum and Self Empty Base with Bagless, Black A SH Cost 119.28 # Pieces In Set: 9 Expandable Design Offers additional # Pieces In Set: 9 Includes: (1) 3 8" Drive Roto Ratchet (1) 5 8"" Deep Well Socket (1) 3 8"" Deep Well Socket (1) 7 16"" Deep Well Socket (1) 1 2"" Deep Well Socket (1) 9 16"" Deep Well Socket (1) 5 8"" Deep Well Socket (1) 11 16"" Deep Well Socket (1) 3 4"" Deep Well Socket (1) 6"" Extension (1) 3 8"" to 1 4"" Drive Adaptor (1) 3 8"" to Hex Adaptor Carrying Case DETECTS & AVOIDS OBJECTS: No need to pick up before your robot cleans because it detects and avoids objects in its path* adapting to everyday changes in your home