Handle Set Screw & Button in Chrome

Hello george, Thank you for your question! We apologize that the information you are searching for was not readily available and I am happy to assist you! We thank you for being a loyal Delta Faucet customer. We recommend using a small tool such as a toothpick or safety pin to remove the button and access the set screw for the Delta Faucet model 4153-DST Single Handle Pull-Out Kitchen Faucet. We also recommend flushing the unit before installing a replacement cartridge. To flush the supply line, first shut off the hot and cold water supply. Remove the hot supply line from the shut-off valve and place the line into a bucket. Open the handle to the middle position, fully open, then turn the cold supply back on for one minute. The cold water should flow through the faucet and out the hot supply tube. Reconnect the supply line and turn on both supplies. Check flow from the faucet. Please contact us back directly via email with any further questions. Best Regards, Skyler

HI Jim05, Thank you for your question about the Delta Faucet model RP62776RB. This is not designed to fit the faucet model 9178-BL-DST. A replacement set screw and cover button is available as part number RP50585BL. Please reach out with any additional questions! Best Regards, Bryan Digital Communications Specialist

Hi Tracy, Thanks for your question regarding RP62776RB! Yes, the button cover is available in Venetian Bronze, Artic Stainless. and Chrome. Thank you for pointing out the concern with the photo; I will have that talen care of. Please feel free to contact us with any questions or for further assistance. Best Regards, Emma Digital Communications Specialist