Easy Installation Pressure installation no drilling no damage to windows and walls The reaction force between the child proof window guard and the contact surface is used for sturdy support just need adjust the length of the four bolts to control the tightness of the child safety window guard Disassembly can be done easily and simply by adjusting the tension of the bolts Details Design The silicone of the adjusting bolt adopts a thread design which increases the friction between the kids tensioned window guards and the contact surface The diameter of the small hole at the bottom of the inside winding window guards is 0197inch which can effectively prevent the babies from inserting their fingers while playing The surface of the extra wide proof window safety guards have been painted is smooth without burrs to prevent the baby from being scratched Security GuaranteeThe gap between the window safety guards for children is 268 and it is impossible for a child to fall through the gap The safety window guards had been tested and it can withstand 220 pounds of pressure and 110 pounds of impactUsing brutal pull with force cant remove the pets safety window guard casement unless you are the Hulk OccasionsThe window safety guards for children suitable for 31508662 windows there are four sizes of 3150 3622 3622 6142 6142 8661 866111810 for choice Suitable for flat window fixed window bay window sliding window removable sliding window etc Sense of responsibilityAs a quality seller we are responsible for every product If you are not 100 satisfied with the child safety window guardwe offer a 30day money back guarantee and life time replacement for defective items