This is a summary with links to all of my posts with XRF test results for keys (house keys, car keys, work keys!)
National Breast Cancer Foundation Breast Cancer Awareness Key: 11,800 ppm Lead [90 ppm and up is unsafe for kids.]
Typical American house key #2 – silver finish: 10,700 ppm Lead. 90 ppm Lead (& up) is illegal in items intended for use by kids.
Kleynimals stainless steel toys keys – a great alternative for babies who just have to play with real metal keys!