As BOSSY, we have been continuing to work and produce with great struggle to achieve this goal since our establishment in 2003, on the way we set out to become an international brand by offering innovative and technological products to the construction sector and the exterior accessories market.

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We are Birikim Kalıp Yapı Ürünleri ve Makine Sanayi Tic. LTD. STI. We produce the best quality products with the most suitable solutions for our customers in Turkey and in many countries of the world. In order to become a leading brand in the sector with our expert engineers and technical infrastructure, we continue our R&D investments continuously in order to catch up with world standards and the technology of the future in our field.

BOSSY is a manufacturer of exterior friction stays, door&window handles, tilt and turn systems and other accessories. It is also the domestic manufacturer of friction stays used for aluminum window profiles.

Our company is a system provider for windows and facades and continues its mass production activities in facade accessories and designs. In line with our vision for product development, we care about our expert team catching up with the technological era and in this sense, we increase our budget for technological investments and training.

Our company, which works with the principle of producing quality, durable and reliable products and with the priority of customer satisfaction, works to be one of the first brands that come to mind in the field of exterior accessories locally and internationally and recommended with its quality.

We always offer the most innovative solutions according to the needs of our customers, we target at 100% customer satisfaction by producing world-class quality products.


To be a world brand that promises the highest level of trust and quality with sustainable growth.


To offer innovative and technological products in Turkey and in the world, to be a brand that is both a pioneer in the sector and among the world’s brands, by observing 100% customer satisfaction.

Trusted by the best