Brass Hardware - Tower Bolt Royal (Prince) Tower Bolt RTB Enquiry Discription 8MM10MMINCHMMRTB-526RTB-5334″100mmRTB-527RTB-5346″150mmRTB-528RTB-5358″200mmRTB-529RTB-53610″250mmRTB-530RTB-53712″300mmRTB-531RTB-53815″380mmRTB-532RTB-53918″450mm