The kit shown is the repair kit for the Cadillac Northstar which uses the same M11X1.5 head bolt thread as the Toyota 2.4L 2AZ-FE and many others. The kit for the Toyota 2.4L 2AZFE is basically the same, but comes with 11 inserts rather then the 21 shown in the picture. You will find there is a huge advantage to using the NS300L™ kit over other repair methods on the market. Most other repairs use the same fine thread on the outside of the insert as the head bolt....the same fine thread that failed in the first place. The NS300L™ uses a much coarser thread on the ouside which allows you to get past the deteriorated aluminum and back into virgin aluminum. It is also much longer to allow much more thread engagement into the aluminum for a solid repair.

NS300L™
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Toyota Camry 2AZ-FE stripped head bolt repair NS300L fix - YouTube