With these changes, at least 37 states and D.C. recognize same-sex marriage. There is also a federal appeals court ruling to uphold states' ban on same-sex marriage. On Nov. 6, 2014, a federal appeals court judge in the 6th U.S. Circuit upheld four states' bans on same-sex marriage.
The screwdriver shank is made of tough steel, and the tip is hardened to minimize wear. The handle is made of wood, metal, or plastic. If a screw cannot be reached with a straight-shank screwdriver, an offset screwdriver is used; this tool has no handle but has a shank with a right-angle bend at both ends. One blade tip is in line with the shank, and the other is at right angles to the shank.
The screw acts as a simple machine when an effort force is applied to the larger circumference of the screw. For example, a person might apply the effort force to a wood screw by turning a screwdriver. That force is then transmitted down the spiral part of the screw called the thread to the tip of the screw.