Description: As a must-have for any factory and workshop, our bit magnetizer ring can be used for both manual screwdrivers and electric screwdriver bits. This product can be easily magnetized just by installing it. It can magnetize bits easily. By the advantages of rust-proof, heat-resistance, high durability and sturdy, these bit magnetizer rings have a longer lifespan than others on the market. It is made of high-quality chrome vanadium and alloy steel material. There are 3 different sizes of screw holders. This product is perfectly suitable for factory, workshop, etc. Item Name: Bit Magnetizer Ring Material: Chrome Vanadium, Alloy Steel Features: Rust-proof, Long Lasting, Strong Magnetic Size Details: 10mm: 2.1cm x 1.8cm/0.83" x 0.71" (Approx.) 6.35mm: 1.6cm x 1.4cm/0.63" x 0.55" (Approx.) 4mm: 1.3cm x 1cm/0.51" x 0.39" (Approx.) Notes: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Package Includes: 3 x Bit Magnetizer Rings As a must-have for any factory and workshop, our bit magnetizer ring can be used for both manual screwdrivers and electric screwdriver bits. This product can be easily magnetized just by installing it. It can magnetize bits easily. By the advantages of rust-proof, heat-resistance, high durability and sturdy, these bit magnetizer rings have a longer lifespan than others on the market. It is made of high-quality chrome vanadium and alloy steel material. There are 3 different sizes of screw holders. This product is perfectly suitable for factory, workshop, etc.