This is a Bondhus Balldriver 6 Piece Metric Hex Screwdriver Set.  These are excellent tools, and they include a lifetime warranty through the manufacturer.  This includes a 1.5, 2, 2.5, 3, 4, and 5 mm hex ball drivers.

Features:

• 
  
  Color coded and ergonomically designed handles proportioned to provide maximum torque without breakage.
  
  
• 
  
  Corrosion resistant Proguard finish creates crystalline structure that doesn't allow water to penetrate
  
  
• 
  
  Made from Protanium high torque steel
  
  
• 
  
  Precision tip eliminates cut off burr problems
  
  
• 
  
  Used for hexagonal socket screws
  
  
• 
  
  Includes 1.5, 2, 2.5, 3, 4 and 5mm sizes
  
  
• 
  
  Bondhus' lifetime warranty
  
  
• 
  
  Packaged in a vinyl pouch