PENN's Slammer IV is packed with more features than ever before. Building on our proven IPX6 sealed housing and coil, we've redesigned our Slammer® drag system to not only be better sealed, but to provide a wider range of usable resistance, while supporting the bearing for added smoothness. By adding our all brass CNC gear technology, 8+1 stainless steel bearing system and hydrophobic line roller bearings, the Slammer IV has become the ultimate workhorse reel.