This say "2 piece kit" in the description, however the title and the photos make it sound like there are 4 8G sticks. What is it?

The product is a 4 Piece Kit consisting of 4 Memory RAM Sticks.

Questions & Answers: CMS 32GB (4X8GB) DDR3 10600 1333MHZ NON ECC SODIMM Memory Ram Upgrade Compatible with Lenovo® Thinkpad W520 Quad Core 4270 4276, 4282, 4284 - C12

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CMS 32GB (4X8GB) DDR3 10600 1333MHZ NON ECC SODIMM Memory Ram Upgrade Compatible with Lenovo® Thinkpad W520 Quad Core 4270 4276, 4282, 4284 - C12

Computer Memory Solutions guarantees compatibility with models provided in description.
Memory Type: Non-ECC SODIMM, 204-Pin
Speed: DDR3-10600, 1333 MHz
4 Piece Kit
Product appearance may vary. Picture for reference only. limited lifetime warranty when bought directly from computer memory solutions