How to work with a small utensil when they are attached to the structure of the house.
ודבר דבר (Dabair Davar): Understanding the Reasons Behind Talking About a Mitzvah on Shabbos;
Using a Door Knocker on Shabbos;
הכנה לחול (Preparations for a Weekday): Doing an Action and Using Only Part of the Outcome. Doing an Act on Shabbos Simply to Save...