Sheriff is an office chair that Mats Theselius designed for Källemo in 2004. The frame of the chair is made of steel and is available in chrome, copper, or black anodized metal. The core leather from Tisnsjö Garveri is available in three colors: Natural, Black, or Brown. The chair can be raised, lowered, and tilted, allowing Sheriff to fulfill the function and flexibility required of an office chair, while its design becomes a distinctive detail in the interior. Recurrent in Mats Theselius' work is his extensive use of leather in combination with steel to create his products.