Sistem Lingkaran-Lebuhraya Kajang Sdn Bhd operates and maintains the 37km KAJANG SILK highway in Malaysia. The company’s highway connects KL-Seremban, Sungai Besi, Cheras-Kajang, and Kajang-Seremban highways. Its highway also enables transportation between north and south of Kajang, as well as transportation from and to Kuala Lumpur, Cheras, Sg. Long and Balakong, Putrajaya, Semenyih, Bangi, KL International Airport, and Seremban.

The company was incorporated in 1995 and is based in Kajang, Malaysia. Sistem Lingkaran-Lebuhraya Kajang Sdn Bhd operates as a subsidiary of Projek Lintasan Kota Holdings Sdn Bhd (PROLINTAS).