Visit our Facebook page @windowsafesg to purchase your window restrictor for your windows. https://www.facebook.com/windowsafesg/ Selling at $35 per piece (without installation); you can get your contractor to install for free! However, if you need installation, we do provide installation package as follows: $72 base price (1 to 6 pieces); $12 per subsequent pieces. See description below for more information regarding this window restrictor, a product from United Kingdom. ...... The window restrictor is lockable, and can be unlocked using a key if necessary, and the window will then be able to be opened fully. Due to this reason, it is possible to fit the Max6mum lockable window restrictor on fire escape windows, provided that the user keeps the key within easy reach. One of the important features on the Max6mum window restrictor is the strength of the cable once locked into the locking system. Some window restrictors claim that the strength of the cable exceeds 500kg. However, even though this may be true, it does not mean anything as it is the strength of the cable once locked into the locking system that actually matters. The Max6mum window restrictor, once the cable in locked into the locking system, can withstand forces over 100kg, which is more than enough to take the weight of any child. This is twice the industry standard which is 50kg! The cable itself is made from hardened steel, which makes it extremely difficult to cut. It makes the window restrictor ideal for customers who are based on ground floors, and want to leave their windows open but are afraid that they may be broken in to! What makes the window restrictor even more unique is that the Max6mum Window Restrictor is Biomaster Protected – Protection against the dangers you can’t see. Biomasterensures effective antibacterial protection for the effective lifetime of the product, helping to keep surfaces clean and hygienic, and reduces the threat of cross-contamination from harmful bacteria – such as MRSA, E.coli, Campylobacter and Listeria and even viruses like the common cold and influenza. Window restrictors, especially those found in commercial properties such as schools, hospitals and hotels, are often handled by many adults and children and can therefore facilitate the spread of harmful infections. Biomaster AT300 suppresses the growth of algae, mold, mildew, fungi and bacteria which cause unpleasant odors, discoloration, staining, deterioration or corrosion only. Manufactured products incorporating Biomaster AT300 may not make any public health claims relating to antimicrobial activity without first obtaining an EPA registration for the manufactured product which permits such claims.