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Rock Climbing Photo: 3/8-inch Star Dryvin (Nail + Sleeve) bolt removed ...
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3/8-inch Star Dryvin (Nail + Sleeve) bolt removed from atop "T-Crack." Brand new, properly placed in hard rock, this beauty had just 1,400 pounds of shear strength (MUCH less in pull-out). In medium to soft rock (such as ours), this had functionally no strength.

Submitted By: Matthew Fienup on Mar 9, 2006
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