Features: *Made of steel, good workmanship, high precision. *The Screwdriver Bits Magnetic Ring can accurately lock screws, reduce abrasion to the the screw and the screwdriver head, extend service life span. *Use it to magnetize the 6.35mm batch head. *Impact resistant and hard, good wear resistance. *Strong magnetism prevents the screws from falling out. *You will receive 4 pieces screwdriver bit magnetic holders, they are practical tools for you to use in daily life, the sufficient quantity will meet your various work needs and replacement. *Ideal for carpentry, dry wall, auto repair, assembling furniture, odd jobs around the house etc. Specifications: Product name: Screwdriver Magnetic Ring Material: Metal Color: Gold, Blue, Red, Purple, Black(As Pictures Show) Hardness: HRC60 Apadter: 1/4'' (6.35mm) Hex Size: 21x15mm/0.83x0.59inch.(Approx.) Magnetism: Strong magnetism Screw head: General purpose System: Metric Suitable for:carpentry, dry wall, auto repair, assembling furniture, odd jobs around the house etc. Quantity: 5pcs Package Included: 5 Screwdriver Magnetic Ring Note: 1.Transition: 1cm=10mm=0.39inch. 2. The real color of the item may be slightly different from the pictures shown on website caused by many factors such as brightness of your monitor and light brightness. 3. Please allow slight manual measurement deviation for the data.