About the foremost color :BCZ varied pitch ,key coloration could be varied (blue ,red ,black ) Before make order ,PLS test under size back : NO 1-NO5 . PLS also give us length 1 & 2 of below picture to ensure the cylinder length inside ,or we are able to delivery 70mm(35mm+35mm) How to envision hook design and no hook design : 1)touch door edge as photograph ,if have keyhole ,then favor hook design ,or prefer no hook design About the one & double & 3 swap : BCZ most customer love double switch design ,So if no comment when make order ,we will delievry double swicth design ...PLS kindly word ( And we recommend that : For Entrance door ,Better want Single Switch design ,Then go away us remark when make order if desire unmarried ,If for indoor ,then greater prefer double change design .) This lockbody no workabe for Three swap . How to make a decision left or appropriate manage ? The manage direction of our single and double swap design both could be changable free ,so u may perhaps take it clean to make order any path ,If u prefer 3 swap design ,Must remark the proper course . HOW TO CHANGE THE HANDLE DIRECTION OF SINGLE SWITCH &DOUBLE SWITCH HANDLE ? The handle course of our Single switch &Double change manage now can changeable ,The means as beneath : 1. if design as beneath : 1) : first turn the manage to the right route as you need ,2) then screw the short screw to repair it . 2. If design as beneath : ( just for the single swap ) Then immediately unscrew it by means of wrench ,then change manage to correct direction ,then fix it . (Three swap design should let us know the right manage path that u need ,it cant replace ) Soft note: 1. Description : 1) Product Name: Anti-theft lock set 2) Material: Handle : Iron with Aluminum lock body : Iron shell with zinc latch cylinder :brass material 2.Transition: 1 cm = 10 mm = 0.39 inches 3.Depending on the gentle and the screen, the colour of the item may be slightly varied from the colour of the picture. 4. Allow 0.5-2cm distinction because of manual size 5 if need to order for giant order ,PLS contact us loose .