Greetings Sanshu: Based upon the pictures the lock up looks to be about 70 to 80 percent. Once the blade tang/lock bar mating surfaces 'break in" there is VERY little additional travel of the bar over time. If you are obsessive like me you may wish to disassemble, clean and lube your new Sebenza. Because of the comparatively high tolerances involved in the Knife design and construction, disassembly and reassembly will quite often alter the percentage of lock bar engagement. An almost imperceptible variance in the alignment of the assembled slabs can cause the lock bar to engage a few percent more in one direction or the other as was pointed out by Gull Wing earlier in this thread. Lightly lubing the ceramic Ball where it rides on the blade tang will help smooth out the action while the knife breaks in. You may wish to view this sticky to assist you. OldDude1
http://www.bladeforums.com/forums/showthread.php?t=260685
http://www.bladeforums.com/forums/showthread.php?t=260685