SKLZ Rain Maker The SKLZ® Rain Maker™ basketball shot trainer improves shooting accuracy and confidence by turning an 18" rim into a 15" rim. The tighter target forces shooters to find the center of the hoop and find the perfect arc on their shot. It includes a detachable "rejecter" to allow for rebounding practice. Durable, all-weather rubber construction. Snugly attaches detaches easily from standard-size 18" rims.