Keystone and cabinet slotted screwdrivers differ primarily in the shape and design of their blades. A keystone slotted screwdriver features a blade that flares out slightly towards the tip, resembling the shape of a keystone. This design provides a broader contact area with the screw slot, which can offer better torque and grip, making it suitable for larger screws or applications requiring more force. The wider tip can also help prevent the screwdriver from slipping out of the screw slot, reducing the risk of damaging the screw or the workpiece. In contrast, a cabinet slotted screwdriver has a blade with straight, parallel sides that do not flare out. This design allows the screwdriver to fit into tighter spaces and is ideal for precision work or when working with smaller screws. The straight blade is particularly useful in cabinetry or other applications where space is limited, and a wider blade would not fit. Both types of screwdrivers are used for driving slotted screws, but the choice between them depends on the specific requirements of the task, such as the size of the screw, the available space, and the need for precision versus torque.

To properly use a slotted screwdriver, first select the correct size of the screwdriver that matches the width and thickness of the screw slot. This ensures a secure fit and prevents damage to the screw or tool. Hold the screwdriver handle firmly in your dominant hand, ensuring a comfortable grip to apply adequate torque. Position the blade of the screwdriver into the screw slot, ensuring it is fully seated to avoid slippage. Align the screwdriver perpendicular to the screw head to maintain control and prevent stripping. Apply steady, even pressure while turning the screwdriver in the desired direction—clockwise to tighten and counterclockwise to loosen. Use your other hand to stabilize the workpiece if necessary, ensuring safety and precision. For stubborn screws, apply additional downward pressure to maintain contact and prevent cam-out. If the screw is rusted or stuck, consider using penetrating oil to loosen it before attempting removal. Avoid using excessive force, which can damage the screw head or the tool. When working in tight spaces, use a shorter screwdriver or a ratcheting screwdriver with interchangeable bits for better maneuverability. For electrical work, ensure the screwdriver is insulated to prevent electric shock. After use, clean the screwdriver blade to remove any debris or residue, and store it in a dry place to prevent rust. Regularly inspect the tool for wear and replace it if the blade becomes damaged or worn to maintain effectiveness and safety.

Common sizes of slotted screwdrivers are typically categorized by the width and thickness of the blade. The most common sizes include: 1. **1/8 inch (3.2 mm) width**: This is a small size used for precision work, often in electronics or small appliances. 2. **3/16 inch (4.8 mm) width**: A medium size suitable for general household tasks, such as assembling furniture or working on small machinery. 3. **1/4 inch (6.4 mm) width**: This is a standard size for many household and automotive applications, providing a good balance between strength and accessibility. 4. **5/16 inch (7.9 mm) width**: A larger size used for heavy-duty tasks, such as construction or industrial applications, where more torque is required. 5. **3/8 inch (9.5 mm) width**: This is one of the largest sizes, used for very heavy-duty applications, often in industrial settings. The thickness of the blade also varies, typically ranging from 0.4 mm to 1.2 mm, depending on the width and intended use. The length of the screwdriver shaft can also vary, with common lengths including 3 inches (7.6 cm), 4 inches (10.2 cm), 6 inches (15.2 cm), and 8 inches (20.3 cm), allowing for different levels of reach and leverage. These sizes ensure that users can select the appropriate screwdriver for the specific slot size of the screw head, minimizing the risk of damage to the screw or the workpiece.

No, a slotted screwdriver should not be used for prying or other non-screw applications. While it might seem convenient to use a slotted screwdriver for tasks like prying open a can of paint or lifting a lid, doing so can damage the tool and pose safety risks. Screwdrivers are specifically designed for driving screws, and using them for other purposes can lead to the following issues: 1. **Tool Damage**: The blade of a slotted screwdriver is not designed to withstand the lateral forces involved in prying. Using it in this manner can cause the blade to bend, chip, or break, rendering the tool ineffective for its intended purpose. 2. **Safety Hazards**: A damaged or improperly used screwdriver can slip or break during use, potentially causing injury. The sharp edges of a broken blade can lead to cuts, and the sudden release of tension when a tool slips can cause hand or wrist injuries. 3. **Inefficiency**: Screwdrivers are not optimized for tasks other than driving screws. Using the wrong tool for a job can make the task more difficult and time-consuming, leading to frustration and potentially damaging the workpiece. 4. **Tool Longevity**: Consistently misusing a screwdriver can significantly reduce its lifespan. Investing in the right tools for specific tasks ensures that each tool remains in good condition and performs effectively when needed. For prying or other non-screw applications, it is advisable to use tools specifically designed for those tasks, such as pry bars, paint can openers, or chisels. This approach not only preserves the integrity of your screwdrivers but also ensures safety and efficiency in your work.

To maintain and care for a slotted screwdriver, follow these steps: 1. **Cleaning**: After each use, wipe the screwdriver with a clean, dry cloth to remove any dirt, grease, or debris. For stubborn grime, use a mild detergent and water, then dry thoroughly to prevent rust. 2. **Rust Prevention**: Store the screwdriver in a dry place. Consider applying a light coat of machine oil to the metal parts to prevent rust, especially if you live in a humid environment. 3. **Storage**: Keep the screwdriver in a toolbox or on a tool rack to protect it from damage. Ensure it is stored in a way that prevents the tip from being knocked or dulled. 4. **Tip Maintenance**: Regularly inspect the tip for wear or damage. A worn or damaged tip can slip and damage screws. If the tip is dull, use a file or a sharpening stone to restore its edge. 5. **Handle Care**: Check the handle for cracks or damage. A damaged handle can affect grip and safety. If the handle is wooden, occasionally apply linseed oil to prevent drying and cracking. 6. **Usage**: Use the screwdriver only for its intended purpose. Avoid using it as a pry bar or chisel, as this can damage the tool and compromise its effectiveness. 7. **Inspection**: Periodically inspect the entire tool for any signs of wear or damage. Replace the screwdriver if it is beyond repair to ensure safety and efficiency. By following these steps, you can extend the life of your slotted screwdriver and ensure it remains effective and safe to use.