The XL spiked roller features longer spikes (1-¼ inch spikes from the core) than traditional spiked rollers which tend to be half an inch length-out. Spiked rollers are designed to roll out air bubbles in epoxy coatings and self-leveling materials to ensure a fine and even finish. The XL Spiked Roller is suitable for thicker coatings where a standard sized spiked roller would be inadequate.