PFERD POLICAP 285 piece set, 1 set (EDP 46090) // To easily change the abrasive caps and cones, give them a slight clockwise twist and pull them up and off. When doing so, leave the arbor clamped in the power tool. For best performance, use with a recommended peripheral speed of 2,000-4,000 SFPM.Set of different POLICAP abrasive caps with matching holders. Comes in sturdy, reusable plastic container with dividers for organization. Abrasive caps and cones fit securely on the holder as it expands during use. Good dimensional stability and excellent fine grinding due to special manufacturing process. Easy cap or cone change. The maximum permitted peripheral speed is 5,000 SFPM. For safety reasons, the maximum permitted rotational speed indicated must never be exceeded. This set includes 270 POLICAP abrasive caps and 15 POLICAP abrasive cap holders.