Helfer Umbrella Holder - Hands-free protection: With this umbrella holder you do not need to hold an umbrella. It keeps you and your tools protected from sun and rain. - Adjustable fit: Holds most umbrellas and offers left-right and forward-backward adjustment for precise positioning. - Secure clamp: Simple clamp mechanism attaches to an existing frame and provides a stable, secure fixation for the umbrella. - Broad compatibility and install: Suitable for three-wheel and four-wheel trolleys and most standard carts. Installation requires drilling holes. - Practical use scenarios: - In a workshop or warehouse, mount on a service cart to shade you and your tools while moving between tasks. - At outdoor markets or construction sites, attach to a trolley to protect merchandise or equipment during transport. - For gardening or yard projects, use on a garden cart to keep shade handy while you work.