Two finger gripper (not a hook) that allows you to grab test pin, leg of electronic component or a wire and measure or analyze signals that goes through it.flat shape and way gripper opens allow dense packing, overall length 50mm. stroke 3mm, can grab from awg30 wire up to 2mm pineyelet inside for connecting wire of your choosing towards analyzerbag of 6, one of each color: red,black white,yellow, green and blue.Red looks bit orange especially in artificial light though.