One-ways are easily installed with a standard screwdriver. Removal may be possible with the "Un-Do-It" removal tools. No matching Driver is needed.
![4-40 X 1 One-Way Round Head Machine Screw, 18-8 Stainless Steel (100/Pkg.) 4-40 X 1 One-Way Round Head Machine Screw, 18-8 Stainless Steel (100/Pkg.)](https://cdn11.bigcommerce.com/s-gdy1ehz/images/stencil/500x659/products/8947/321963/RoundHead-One-Way-Machine__57647.1421789033.1280.1280__63341.1592369687.jpg?c=2)
Tamperproof Screw Company
4-40 X 1 One-Way Round Head Machine Screw, 18-8 Stainless Steel (100/Pkg.)
$11.50
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