The new Multi-Function Key (MFK) Kit is poised to revolutionize the automotive key industry. One single kit will provide the flexibility to create hundreds of mechanical keys in 24 of the most common keyways. Combine it with MFK Heads and a handful of chips and now you've got the power to create TONS of different transponder keys. Never worry about running out of the most common blanks on the market without the need to invest thousands in inventory. � Use as TEST KEYS : Using the reusable, blue universal head, cut these inexpensive blades and test in the lock before duplicating onto a more expensive transponder key or remote head key.� Use as PLASTIC-HEADED KEYS: Combine these blades with the appropriate Nitrous Key heads to give your customer a permanent, high quality mechanical key.� Use as TRANSPONDER KEYS: The same Nitrous Key heads also work as a transponder key. Just insert the right chip, program, and get paid.Includes:� Nitrous Keys MFK Blade Set�240 Blades (27600409)� Nitrous Keys MFK Heads Set�77 Heads (27701284)� Nitrous Keys Transponder Chip Set�80 Chips (27500679)