Knurled Thumbturn and ReleaseThe Courtyard Express knurled thumbturn and release features a modern diamond cut knurled pattern on the thumbturn set against a smooth round rose, with a coin release on the opposite side to quickly and easily open doors in an emergency. This contemporary privacy thumbturn is created from a base of solid brass and is available in a range of finishes: Antique Brass, Satin Brass PVD, Polished Nickel PVD, and Dark Bronze PVD. The Knurled collection