The CYCLONE ULTRA STRAIGHT EDGE SNAIL LOCK WHEEL by Diamax is designed for use on auto edge machines. Grit: 400. Materials: Granite, engineered stone, marble. WET only. Provides all the great features of the Cyclone version at a more competitive price. Outperforms other industry brands at the same price point level. More forgiving when polishing engineered stone with minimal water. Available in 5″ & 6″. 8 mm resin thickness. Fitting: Snail Lock.