Related Clues:

• Black figure
• It's worth something
• Awl or auger
• One for the plus column
• Hammer or saw
• Lever or level
• It has value
• Trade requirement?
• It might be fixed or frozen
• Pitcher's pinpoint control, say
• One used as a dupe
• Great trait
• Black & Decker item
• iPhone or BlackBerry
• Dig find, perhaps