기능

• Easy sash crime prevention, with a ratchet that does not loosen due to vibration.
• The gear inside the knob is fixed by a loosening prevention mechanism and does not loosen even if there is vibration.
• Installation is done by tightening the knob and no tools or adhesion are required.
• To remove it, loosen it while holding the knob center fitting.
• Ventilation is also OK. Even next to a ventilation fan, it does not loosen due to vibration.
• Installation requires no tools or adhesion, so it is recommended for people in rental houses.
• Motion range 27 to 44 mm