High magnetic: The magnetic force is increased by 10 times, the clamping is stronger, and the efficiency is not lost. (3 pieces in one package with three colors) Function: Lock screws precisely and securely while reducing abrasion of the screw and screwdriver. Material Premium Quality: Made of S2 alloy steel, it is well made and has high precision, high efficiency and long service life Suitable: Only suitable for 6 double head screwdriver bits .35mm in diameter with an aluminum alloy positioning magnetic ring Easy to use: just insert the screwdriver into the magnetic ring, the screw can be easily picked up and fixed. Specification: Color: Red, Blue, Yellow Material: Aluminum Alloy Product Size: 23 * 15mm/0.91 * 0.59 Tool Head Size: 6.35mm(1/4) Weight: 8g /pc Contents:3 Pack Magnetic Ring Screwdriver