The Link-Belt 145 X4 Spin Ace is a hydraulic excavator in the Link-Belt X4 series, designed for general earthmoving, utility work, and site preparation. It features a compact 14.5-ton class operating range, a Spin Ace upper structure for reduced tail swing, and hydraulic controls suited to digging, trenching, lifting, and material handling. The machine is commonly configured with a boom, arm, bucket, and undercarriage optimized for stability and maneuverability in confined job sites. The 145 X4 Spin Ace is used in construction, landscaping, municipal work, and light demolition applications where reach, control, and transportability are important.