According to the reviews I read, this is a general around-the-house socket set. It doesn't sound like it's made for continuous heavy-duty use.

Price:$8.85 & eligible for FREE Super Saver Shipping on orders over $25


Technical Details
  • 40-piece socket set; metric and English sizes
  • 3/8-inch reversible ratchet and accessories
  • Triple chrome plated to resist rust
  • Includes 1/4-inch and 3/8-inch drive sockets, molded plastic case
  • 9.8 by 1.8 by 5-inches; 2.2 pounds; lifetime warranty

Found here: Amazon.com: Great Neck PSO40 40 Piece 1/4-Inch and 3/8-Inch Drive Socket Set: Automotive