What is a Pozidriv Screwdriver?


A pozidriv screwdriver, is a type of screwdriver that is designed to turn pozidriv screws. Pozidriv screws have a cross-shaped head with four additional small lines radiating from each arm of the cross, forming a star shape. The pozi screwdriver has a matching tip with four blades that fit into each of these lines, allowing for more torque and grip than a standard Phillips head screwdriver.

The pozi screwdriver was invented in the 1930s by the British company, GKN Screws and Fasteners Ltd. Its purpose was to provide a better screwdriver for manufacturing assembly lines that would allow for more efficient and reliable performance than the Phillips head screwdriver.

Compared to a Phillips head screwdriver, a pozi screwdriver has a unique feature of additional lines radiating from each arm of the cross. This design offers a more secure grip on the screw head, reducing the likelihood of the screwdriver slipping out during use. Additionally, pozi screws are less likely to strip or round off compared to Phillips screws.

One of the main differences between pozi and Phillips screwdrivers is the number of lines radiating from the arms of the cross. Pozi screws have four lines, while Phillips screws have only two. While the two screwdrivers may look similar, using the wrong one can cause damage to your screw or screwdriver. It’s important to use the correct screwdriver for your screw to ensure proper stability and torque.

Pozidriv Screws Sizes Explained

Pozidriv screws come in various sizes to accommodate different applications and materials. The size of a Pozidriv screw is usually indicated by a number, which corresponds to the size of the screwdriver needed to turn it. Here’s an overview of the common Pozidriv screw sizes and their corresponding screwdriver sizes:

  • PZ0 (Pozidriv 0): This is the smallest Pozidriv screw size, suitable for precision work and small-scale applications, such as electronics or intricate woodworking projects. It requires a PZ0 screwdriver.
  • PZ1 (Pozidriv 1): PZ1 screws are slightly larger than PZ0 screws and are commonly used for small household repairs, light-duty woodworking, and general DIY tasks. A PZ1 screwdriver is needed for these screws.
  • PZ2 (Pozidriv 2): PZ2 screws are one of the most widely used sizes for medium-duty applications, such as assembling furniture, cabinetry, and installing fixtures. They offer a good balance between strength and versatility. A PZ2 screwdriver is required for this size.
  • PZ3 (Pozidriv 3): The largest common Pozidriv screw size, PZ3 screws are designed for heavy-duty projects and construction, such as framing, decking, and securing structural components. A PZ3 screwdriver should be used with these screws.

It’s important to note that there are less common Pozidriv screw sizes (such as PZ4) that may be encountered in specific applications. However, the sizes mentioned above (PZ0 to PZ3) cover the majority of everyday uses.

When selecting a Pozidriv screwdriver for your screw, ensure that the tip fits snugly into the screw head without any wobble or play. Using the correct size screwdriver helps prevent damage to the screw head and ensures proper torque is applied during tightening or loosening.

When to Use a Pozidriv Screwdriver:

A Pozidriv screwdriver is best used when working with Pozidriv screws, which have a cross-shaped head with four additional small lines radiating from each arm of the cross, forming a star shape. These screws are commonly found in:

  • Furniture assembly
  • Cabinetry and woodworking projects
  • Electrical equipment installation
  • Automotive repairs and assembly
  • Metalworking projects
  • General household repairs and DIY projects

How to Use a Pozidriv Screwdriver:

Select the correct size: Pozidriv screwdrivers come in different sizes, such as PZ0, PZ1, PZ2, and PZ3. Choose the right size for your screw to ensure proper stability and torque. The screwdriver tip should fit snugly into the screw head without any wobble or play.

Insert the screwdriver: Position the Pozidriv screwdriver tip into the screw head, ensuring that it’s properly aligned with the cross shape and secondary lines. Apply gentle pressure to keep the screwdriver seated in the screw head.

Turn the screwdriver: To tighten the screw, turn the screwdriver clockwise while maintaining downward pressure. To loosen the screw, turn the screwdriver counterclockwise while keeping the tip firmly seated in the screw head.
Avoid over-tightening: When tightening a screw, avoid applying excessive force or over-tightening, as this can strip the screw head or damage the screwdriver.

Tips for Using a Pozidriv Screwdriver:

Use the right screwdriver for the job: Do not use a Pozidriv screwdriver on Phillips screws or vice versa, as this can damage the screw, as well as the screwdriver.

Keep the screwdriver tip clean and sharp: Regularly inspect the tip of your Pozidriv screwdriver for any signs of wear or damage. A worn or damaged tip can slip out of the screw head, potentially causing damage to your project or injury.

Pre-drill pilot holes: For larger screws or when working with hardwood, pre-drilling a pilot hole can help prevent splitting the material and make driving the screw easier.
Use the appropriate length screwdriver: Choose a screwdriver with a shaft length that allows you to comfortably reach the screw and apply adequate torque without overextending your arm or straining your wrist.

By following this guide, you should now have a good understanding of when and how to use a Pozidriv screwdriver. With the right knowledge and techniques, you’ll be well-prepared to tackle a wide range of DIY projects using this versatile and reliable tool.

In Conclusion

A pozi screwdriver is a specialized type of screwdriver designed to turn pozidriv screws. It has a unique design that offers a more secure grip on the screw head than a standard Phillips head screwdriver. When selecting a pozi screwdriver, make sure to choose the correct size for your screw to ensure proper stability and torque. The pozi screwdriver is a useful tool to have in your toolkit, with its unique features making it a reliable choice for a wide range of applications.