Neodymium magnets should be able to do what you’re asking, 5 lbs should be fine and the cost varies but you should be able to buy a larger one on amazon. Even smaller ones can have hundreds of pounds of holding power.

For example: Fishing Magnet, 400LBS 2.5 Inches Neodymium Rare Earth Magnet with Lifting Eye-Bolt Ideal for Retrieving Items in Lake,Beach,Lawn and New House(Silvery White, Pack of 1) https://www.amazon.com/dp/B07RFRH2MV/ref=cm_sw_r_cp_api_i_WMDTDbGRS47TA

You need to be careful with them though, don’t get your finger caught between two of them. They are dangerously powerful.