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Prototype bits for a new rock abrasion tool (never used)

Prototype bits for a new rock abrasion tool (never used)
Prototype bits for a new rock abrasion tool (never used) A series of prototypes for a rock abrasion tool for Mars Science Laboratory, which was never developed (they switched to a percussive drill). The "teeth" are much longer than for MER because the drill would have needed to last much longer. Emily Lakdawalla