Hi MamaAsh,
Thank you for your review of the Delta Faucet model 75699. Please accept our sincere apology for any inconvenience you are experiencing. We are happy to help!
Nonmetallic parts are used to ensure a long-lasting, high-quality product while maintaining safety control for the various temperatures of water. With any hand shower, for example, the part that you would grab onto is typically made of plastic or a plastic mixture, as metal is heavier, susceptible to corrosion, and retains heat.
Please reach out with any issues or questions!
Best Regards,
Bryan
Digital Communications Specialist
(800) 345-3358
customerservice@deltafaucet.com