3 X PIECES OF Additional Key Cut Only When You PurchasingOur Mul-t-lock MT5+ LocksTHE MT5+ KEYAll MT5+ products have a patented double-sided key. One set of cuts is for the telescopic pin mechanism and the other cut, the milled pattern, is for the locking bar. The combination provides enhanced key security and higher manipulation resistance. To maximize user friendliness, the key also features an elegant, ergonomic key head with a special silky texture.ADVANCED KEY CONTROLThe MT5+ key secure system is supported by the unique key authorization magnetic strip card. This card must be presented to the locksmith to enable additional keys to be supplied. Only when the magnetic key card is presented to the dedicated MT5+ key duplication machine, can the required key code be configured.