This is L-style! The rip-point is just like you have been completed.
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These screws will not loose!
Currently a Japanese patent has been able to produce a great thread standard, which can be used with most of the female side of the screw.
This technology makes it a great addition to any safety safety level such as planes, cars, trains, spaceships, and more!
L-style representative Akasawa Jinta
Product Features:
Screws that will not loosen
Absolute Hardness
Compatible with a variety of boards
Set Contents: 60 pieces (2 bags set).
(From )