Bag Boy Umbrella Holder The Bag Boy umbrella holder's clamp easily attaches to the cart frame tube and requires two screws to be tightened. The umbrella holder is adjustable for different size umbrella handles Once the umbrella is attached to the cart with the umbrella holder, the umbrella can easily be adjusted to the left, right, forward or backward. Guaranteed to fit Bag Boy models The Bag Boy Umbrella Holder fits most other golf carts currently on the market.