1. Material: Aluminum alloy
2. Size: 7.5*1.6*1.6 cm
3. Small size easy to carry

Be careful:
1. The diameter of the inner column is 4mm. Make sure that the inner diameter of your keyhole is larger than 4mm. It doesnt matter if it is much larger.
2. The inner column is about 11mm high. If you have a special key please measure it in advance.
3. Cross keys can be installed (the thickness is equal to 3-4 ordinary keys). Black rubber head keys can be installed in two ways: direct installation or electrocautery dissolution of plastic supplements most of the metal parts are perforated.