31 in 1 Mini Screwdriver Set, VCOO Protable Torx Bit Tools Set, Small Precision Screwdriver Kit for Precise Repair or Maintenance 31 in 1 mutil function precision screwdriver set,easily interchangeable. Available for repairing laptops, mobile devices, and other precision items like wristwatches. Light weight,compact design,professional portable hardware tools. Handle is designed based on Human Mechanics, which makes operation more efficient and convenient. It comes with plastic storage box for easy transport.