The Parallax Gripper Kit for the Boe-Bot Robot is newly redesigned Gripper Kit that adds pick-up and carry capability to your Boe-Bot robot at the reasonable price. The Gripper features parallel plates that open, clamp onto and lift objects all with one cleverly utilized Standard Servo. Since the Gripper's servo plugs right into a servo port on the Board of Education, no additional battery pack is needed. Gripper hardware weighs less than 7 ounces. Features: • Clamp onto objects up to 2 in (5 cm) wide • Lift up to 4 ounces (113 grams) without counterweight • Lift up to 14 ounces (397 grams) with counterweight (not included)