devices and methods for manipulating devices such as micro - scale devices are provided . the devices can include a tether of various materials surrounded by a stiff body . the tether interfaces with microscale devices to draw them against the stiff body , holding the microscale devices in a locked position for insertion into or extraction out of tissue . the tensional hook and stiff body are configurable in a multitude of positions and geometries to provide increased engagement . such configurations allow for a range of implantation and extraction surgical procedures for the device within research and clinical settings .