1)Material:brass 2)Finishes:PB, SN, PC, SB,etc 3)T-cam:30 or 0 4)Double open with 1 row ... ,65mm,70mm,75mm,80mm,90mm,etc ;3)Finishes: PB, SN, PC, SB, AB, AC,etc ;4)Keys: 5 computer keys or ... knob or double open ;6)Screw: 60mm, half whorl ;7)T-cam: 30 or 0º ;8)Marbles: 1 or 2 rows ... all Processed by Highly accurate CNC machine ,and our R&D and QC have 10years of professional experience in this area ...