About this item ✅VALUE SETS:Package includes 6 pieces, 3 sizes magnetic bit holder, 2"/60mm, 4"/100mm, 6"/150mm to satisfy your various needs , with 1/4 inch driver adapter and 1/4 inch hex shank suitable size for easy use in daily life ?DESIGN CONSIDERATIONS: Quick Release extension drill bit design with Locking mechanism and built-in magnetism(only the hole part)that ensures your bits stay in place when using, holds bit securely. ☀️EASY TO USE:Quick change and release system of drill extension bit holder, you can quickly install and change the bit easily. just simply push the sleeve up .you will swap it out. ?PREMIUM QUALITY:These drill bit holders are constructed from premium Chrome Vanadium steel，wear resistance, durable and long service life. ?WIDE APPLICATION: These screwdriver bit extension works with 1/4-inch drive bits , easily fit into batch head,pneumatic drills, screwdrivers,and other hexagonal tool .. Please note Only for Single Head Hex Shank Drill, NOT for double head bits! › See more product details