Check the listing for details. Universal IC Test ZIF Socket 18 Pin 3.0mm Pitch for Microcontroller, Chip 5 Pack. Condition: New. Listed at 12.73 USD. What is this?The locking socket is a universal ZIF IC test socket, used for holding microcontrollers whilst programming, for integrated circuit chips such as microcontroller chips, breadboards, circuit boards, etc.What will I get?Package Content: 5 Pack Universal ZIF Socket; Pin Number: 18; Pitch: 3.0mm; Size: 38x15x27mm/1.5x0.59x1.06 inch (L*W*H); Pin Distance: 21mm/0.83 inchAre there any advantages of the product?The socket is made of green plastic shell and copper tin plating, are electrically conductive on all contacts. Solid grabbing closing force on the legs of the attached IC, they can hold chips well.How to use it?Easy to remove and program the IC chip without fear of damage, fit fine into a UNO's board socket, and work great for soldering onto a prototype board and PCB board.