Feature: 1. The drill bit screwdriver are built to last, composed of alloy steel for maximum durability. 2. Long-lasting engineered tips provide enhanced strength that can handle high-torque impact drivers. 3. Works with most drilling power tools for effortlessly and efficiently tightening or loosening screws. 4. Portable, plastic, storage case with a secure latch for keeping the bits securely contained, neatly organized, and easy to find. 5. Great for appliances, household, furniture repair, toys, construction, workshop, automotive, bicycle, industrial, DIY home improvement project. Specification: This drill bit set and screwdriver bit set all come with a plastic box for storage and organization. Its a great ideal for appliances, computers, fixtures and electronic gadgets ,all home and workshop DIY. Features: The drill bit screwdriver are built to last, composed of alloy steel for maximum durability. Long-lasting engineered tips provide enhanced strength that can handle high-torque impact drivers. Works with most drilling power tools for effortlessly and efficiently tightening or loosening screws. Portable, plastic, storage case with a secure latch for keeping the bits securely contained, neatly organized, and easy to find. Great for appliances, household, furniture repair, toys, construction, workshop, automotive, bicycle, industrial, DIY home improvement project. Specifications: Model: 4A15, 4A16, 4A17 (Optional) Number of Pieces: 15Pcs, 20Pcs, 45Pcs (Optional) Material: Alloy steel Package Weight: 500g / 17.63oz Package Size: 15 * 9.7 * 4.5cm / 5.91 * 3.82 * 1.77in Package List: 45 * Screwdriver Bit Set 1 * Plastic Box Package List: 45 * Screwdriver Bit Set 1 * Plastic Box