10 PCS MINI SCREWDRIVER BIT SET + 3PCS MAGNETIC QUICK RELEASE DRILL BIT EXTENSIONPRODUCT SPECIFICATION:MATERIAL: Cr-VDRILL BIT SHANK: 1/4 inchDrill Bit Length: 2''(60mm), 4''(100mm), 6''(150mm) PRODUCT FEATURES:? [PREMIUM MATERIAL]-This 3 pcs drill bit extension and 10 pcs screwdriver bit set is made of industrial grade heavy-duty chrome-vanadium steel. This tool accessory set is durable, withstanding high pressure. Great solution to many of your jobs.? [STRONG MAGNETISIM]- Locking mechanism and strong built-in magnetism make the drill bit holder easy to pop up batch head automatically, fast and quick release ensured. ? [DIMENSION]- 3 PCS quick release magnetic drill bit extension have 1/4'' driver adapter and 1/4 inch hex shank; Package includes 3 Length - 2''(60mm), 4''(100mm), 6''(150mm) to satisfy your various needs. ? [MIXED SCREWDRIVER BIT SET]- 10 PCS screwdriver bits are included: 3 size slotted screwdriver bits, 4 size Phillips screwdrivers and 3 size Torx screwdriver bits. ? [WIDELY-USED]-In installation of pneumatic screwdriver, electric screwdriver, pneumatic drill, manual screwdriver and other installation for the hexagonal tool . A must-have package for conversion. Great for DIY work, household maintenance, and most general repairs, not for industrial work. A great tool addition to any tool box set.