The Redrock Micro Nano Focus Zoom Lever helps you to control the focus or zoom function on your 35mm lens more accurately.The Redrock Micro Nano Focus Zoom Lever is an essential lens accessory that helps get better photography resultsIt is compatible with the microLensGears, which has to be purchased separately, to match the size of the camera lensYou can easily attach the Redrock Micro Nano Focus Zoom Lever to the 35mm lens without the aid of screws or glue