A surgical retractor comprising: an arm (1102, 1502) comprising an opening and a first notched surface, wherein the first notched surface comprises a plurality of notches that extend radially outward from the opening; and a blade (108, 1708) comprising a nipple (132, 1732) and a second notched surface (202, 1702), wherein the second notched surface (202, 1702) comprises a plurality of notches that extend radially outward from the nipple; wherein the opening is configured to receive the nipple (132, 1732), wherein attaching the blade (108, 1708) to the arm such that the first notched surface and the second notched surface (202, 1702) mate secures the blade relative to the arm such that the blade cannot swivel radially about the opening, and wherein the nipple (132, 1732) includes a first recess (402, 1740) that runs circumferentially around an exterior surface of the nipple, wherein the blade (108, 1708) is attachable to the arm (1102, 1502) by either (i) inserting the nipple (132, 1732) into the opening and forcing a ball bearing into the first recess (402, 1740), and wherein the first notched surface and the second notched surface (202, 1702) mate when the blade (108, 1708) is attached to the arm by forcing the ball bearing into the first recess (402, 1740), or (ii) inserting the nipple (132, 1732) into the opening and manipulating an end of a thumb screw into the first recess (402, 1740), and wherein the first notched surface and the second notched surface (202, 1702) mate when the blade (108, 1708) is attached to the arm by manipulating the end of the thumb screw into the first recess (402, 1740). an arm (1102, 1502) comprising an opening and a first notched surface, wherein the first notched surface comprises a plurality of notches that extend radially outward from the opening; and a blade (108, 1708) comprising a nipple (132, 1732) and a second notched surface (202, 1702), wherein the second notched surface (202, 1702) comprises a plurality of notches that extend radially outward from the nipple; wherein the opening is configured to receive the nipple (132, 1732), wherein attaching the blade (108, 1708) to the arm such that the first notched surface and the second notched surface (202, 1702) mate secures the blade relative to the arm such that the blade cannot swivel radially about the opening, and wherein the nipple (132, 1732) includes a first recess (402, 1740) that runs circumferentially around an exterior surface of the nipple, wherein the blade (108, 1708) is attachable to the arm (1102, 1502) by either (i) inserting the nipple (132, 1732) into the opening and forcing a ball bearing into the first recess (402, 1740), and wherein the first notched surface and the second notched surface (202, 1702) mate when the blade (108, 1708) is attached to the arm by forcing the ball bearing into the first recess (402, 1740), or (ii) inserting the nipple (132, 1732) into the opening and manipulating an end of a thumb screw into the first recess (402, 1740), and wherein the first notched surface and the second notched surface (202, 1702) mate when the blade (108, 1708) is attached to the arm by manipulating the end of the thumb screw into the first recess (402, 1740). (i) inserting the nipple (132, 1732) into the opening and forcing a ball bearing into the first recess (402, 1740), and wherein the first notched surface and the second notched surface (202, 1702) mate when the blade (108, 1708) is attached to the arm by forcing the ball bearing into the first recess (402, 1740), or (ii) inserting the nipple (132, 1732) into the opening and manipulating an end of a thumb screw into the first recess (402, 1740), and wherein the first notched surface and the second notched surface (202, 1702) mate when the blade (108, 1708) is attached to the arm by manipulating the end of the thumb screw into the first recess (402, 1740).