3 PCS 60MM QUICK CHANGE DRILL BIT HOLDER+10 PCS MINI SCREWDRIVER BIT SETPRODUCT SPECIFICATION:MATERIAL: Cr-VDRILL BIT SHANK: 1/4 inchDrill Bit Length: 2inch(60mm) PRODUCT FEATURES:? [PREMIUM MATERIAL]- This 3 PCS magnetic drill bit extension and 10 pcs screwdriver bit set is made of industrial grade heavy-duty chrome-vanadium steel, durable, withstanding high pressure. This tool accessory kit provides great solutions to many of your jobs;? [STRONG MAGNETISIM]- With locking mechanism and strong built-in magnetism, the quick change drill bit holder pops up batch head easily and automatically, fast and quick release ensured. ?[DRILL BIT EXTENDER-DIMENSION]- 60mm (2.4inch) long quick release magnetic drill bit extension with universal 1/4inch driver adapter and 1/4 inch hex shank, fitting most tools; ? [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.