Feature: 1. 3 pieces set with different length (60mm, 100mm, 150mm). 2. Made of premium quality material, solid and High quality. 3. Magnetic bit holder with locking mechanism, provides convenient pick-up. 4. Save your precious time and perform auto repair tasks easily. 5. Great for DIY work, household maintenance, and most general repairs. Specification: Features: 3 pieces set with different length (60mm, 100mm, 150mm). Made of premium quality material, solid and High quality. Magnetic bit holder with locking mechanism, provides convenient pick-up. Save your precious time and perform auto repair tasks easily. Great for DIY work, household maintenance, and most general repairs. Note: this set only work with single-head bit, NOT double-head bit. Specifications: Material: High Carbon Steel Quantity: 3 Pcs Length: 60mm (2.4in), 100mm (3.9in), 150mm (5.9in) Shank: 1/4" Hex Shank Package Size: 18 * 3 * 2cm / 7.1 * 1.2 * 0.8in Package Weight: 121g / 4.3oz Package List: 3 * Drill Bit Extension Package List: 3 * Drill Bit Extension