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These plastic triangles on bus/truck tire nuts let drivers easily see if a nut has loosened based on if the triangle has rotated. : r/mildlyinteresting
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Amazon.com: Fixinus Full Triangle Head Screwdriver Set For Electronic Toys, 7-Piece Triangle Security Screws Driver Tool Kit For Thomas McDonald's Toy Series Repair Battery Disassemble - Toys Triangle Driver Set : Tools
![Key Sockets Wrench Screwdriver Nutdriver | Stanley 10 Screwdriver | Hex Socket Stanley - Screwdriver - Aliexpress Key Sockets Wrench Screwdriver Nutdriver | Stanley 10 Screwdriver | Hex Socket Stanley - Screwdriver - Aliexpress](https://ae01.alicdn.com/kf/HTB1c1EnJWSWBuNjSsrbq6y0mVXaP/Stanley-1pcs-hollow-shaft-hexagon-nut-driver-hex-key-sockets-wrench-screwdriver-nutdriver-hand-tools-5mm.jpg)
Key Sockets Wrench Screwdriver Nutdriver | Stanley 10 Screwdriver | Hex Socket Stanley - Screwdriver - Aliexpress
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Utoolmart 9mm Nut Driver, 6-Point Hex Nut Socket Driver Non-Magnetic Tip, High-Torque Nut Driver for Added Torque, with 98mm Round Shaft & Handle Triangle Enforce Hole - Amazon.com
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