The TRU Self-Leveling Spiked Roller Set is a specialty 18″ (46 cm) finishing roller with included frame designed specifically for Rapid Set self-leveling products. It efficiently releases air trapped during mixing, significantly reducing pinholes. The spacing of the 2” (5.1 cm) polypropylene spikes is specially designed to maximize the aggregate exposure of TRU® PC Polished Concrete in the finished floor. The TRU PC SPIKED ROLLER also improves the uniformity of the finished floor by removing lines left by the gauge rake or smoother. The spikes are durable and can be easily cleaned for repeated use.