Features: Made of good quality material, safe and durable to use. Magnetizing or demagnetizing the metal tools and small parts immediately. Can also be used to demagnetize tools or parts you don& 39;t want magnetized. No batteries or electrical required, easy to use. The powerful permanent magnet is built-in and is high density industrial magnet. Description: When it is diffcult to pick up the screwinsert a screwdriver"+"sign that end of magnetization,so that it is easy to pick up the screws When repair electrical appliances,electronic components,insert a screwdriver"-" word narkln the end,immediately remove magnetic Convenient portable sized tool. multi-functional. Specifications: Color: Blue Size: 52*50*28mm Packing Content: 1x Magnetizer Demagnetizer For Electric/Manual Screwdriver