The Delamain DK13 Small Bathroom Turn & Release Polished Brass is designed for use with Delamain knob sets, or independently.  A 90 degree turn of the oval thumbturn knob will lock or unlock the bathroom door when either a bathroom deadbolt or full bathroom lock is fitted. Other Variations The turn & release is also available in the following finishes: Florentine bronze Polished chrome Satin chrome Some of these variations can be found in the related products. Emergency Release Function Current building regulations require that any lock, fitted to a bathroom, cloakroom...