Cheese Head. A cheese head has cylindrical sides that has a flat disc top (similar to a wheel of cheese) plus a flat bearing area. An external Torx screw has a projecting head in The form of a Torx screwdriver bit (as https://nanadmwz804057.fliplife-wiki.com/3415209/how_much_you_need_to_expect_you_ll_pay_for_a_good_types_of_screw_heads