An uncommon object. What is it?

Challenge #14 in the Photos - miscelaneous topics series. Hosted by barb_s.
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Have you ever been invited to a party where you brought something uncommon that guests examine and guess what it is? Show that kind of object, the whole object, not a closeup macro. Plan your photo as if you were creating a still life. Lighting and composition are important. This challenge is not a snapshot guessing game. It's about a well executed photograph.
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A Bow Back-Tension Release
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13th place
Mainly used in shooting compound bows, this type of Release is built and adjusted to activate by using back muscles. Developed in 1970 by Mel Stanislawski.
Submitted: Thursday, 2nd February, 2012 00:55 (GMT)
Taken: Friday, 27th January, 2012
Focal length: 51 mm
Shutter speed: 1/30 sec
Aperture: F2.8
ISO: 64
Notes: Detailed use is too complex to describe here, but bowstring releases are mainly used with short, heavy bows because of acute string angle making it difficult to draw and release with bare fingers. This type of release is considered advanced, and is not recommended (too dangerous) for beginners.
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