●They have a hEX8, hEX10, hEX13, m14 or a round door for use with keys or system. ●KRT050005 – Lettering: hEX10; kRT050008 – : m14 ●KRT050002 – lettering: 6 mm; kRT050004 hEX8 – lettering: ●KRT050001 – lettering: hEX8 for further information, see product details ●KRT050009 - : m14; kRT050011 hEX13 - lettering: