Hand-held design and rolling wheel make it easy to mark surfaces like golf courses and football fields in minutes. The marker securely holds 1 aerosol can (18 oz) for spraying lines, touching up existing markers, or filling in stencils. Quickly interchange cans to use different colors. The handle has an easy-to-use trigger for quick dispensing and narrower lines. It's easier to control than larger markers and has a nice grip to keep your hand comfortable when marking large areas.