155445 Cup Wheels Size: 4" Features: -Double Row Cup Wheels MK-304SG-2.-Standard grade, double row cup for stone and concrete.-Have a unique shape which allow for superior form mark removal.-These highly efficient cup wheels are also effective in the process of concrete deburring and rough-surface grinding.-Their lightweight design and range of sizes ensure fast surface grinding with a minimum of operator fatigue.-Can be used wet or dry.-Arbor: 7/8-5/8".-Segments: 24. Dimensions: -Item # 155445 - Diameter: 4", Weight: 1.1 lbs.-Item # 158069 - Diameter: 5", Weight: 1.05 lbs.-Item # 155447 - Diameter: 7", Weight: 2.25 lbs.