Drill Bit Extension 3 PCS Quick Release Magnetic Drill Bit Holder PRODUCT SPECIFICATION: MATERIAL: Steel HEX SHANK: 14 inch Length: 2 inch(60mm), 4 inch(100mm), 6 inch(150mm PRODUCT FEATURES: [PREMIUM MATERIAL] This drill bit extension set is made of industrial grade heavy duty chrome vanadium steel, durable, withstanding high pressure; [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 14 inch driver adapter and 14 inch hex shank; Package includes 3 Length 2 inch(60mm), 4 inch(100mm), 6 inch(150mm) to satisfy your various needs. [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. [FINE WORKMANSHIP] Excellent surface coating provides extra protection from damage against elements and substances such as oil and fluids that may come in contact with the extension bars during usage.