
For cinematographers, this is the perfect tool for tightening Arca Swiss and cameras that use 1/4-20 and 5 pan head screws /32 or 4mm hex. You can also grind down part of the hinge and use it to tighten the slotted screws. Inexpensive and easy to carry on your keychain or clip to your bag. Good quality hexagon. Overall length 2-1/8", straight section 1", hole approx. 3/4" inner diameter. The only downside is that it can't open bottles ;-)

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