Brushes designed for hard to reach areas or for special applications. Each brush fits into our Shur-Lok Handle System. Shurhold's special application series of brushes is designed for more specialized work beyond just regular washing. This series includes attachments compatible with Shurhold handles. These are based out of a solid wood block with a rubber wrap-around bumper to prevent marking any surface. Extra Soft Hull brush- (Item# 310) 8 inch brush with blue nylon bristles designed for working on vertical surfaces and is safe on delicate surfaces like isinglass and plexiglas.