Small Magnetic part holder
This is the magnet I used https://www.harborfreight.com/pack-of-2-ceramic-block-magnets-97504.html?utm_source=google&utm_medium=cpc&utm_campaign=12169520316&campaignid=12169520316&utm_content=126806015479&adsetid=126806015479&product=97504&store=3342&gclid=CjwKCAjwvfmoBhAwEiwAG2tqzIX_gh_mW5AOldpgVgM1KjZA5iYOCeHgOOdGMJb1P2RWgAfSgTRFURoChbEQAvD_BwE
This magnet is an in store option only but the dimensions are 25.4mm x 22.2mm x 9.5mm