Bits
Discover over 230 bits for Phillips, Pozidriv, hex, and Torx made from high-strength S2 steel. The drive sizes 1/4 inch and 5/16 inch ensure compatibility with common cordless screwdrivers and hand holders.
Buying bits — guide&Tips
In this category with 238 items, you will find bits for almost every screwdriving task — from classic cross-recess to specialized Torx drive. To choose the right tool for your project, it's worth considering material, drive type, and compatibility.
Material and workmanship:High-quality bits are often made from S2 steel, an alloy with high hardness and good toughness. These steels withstand high torque and offer precise fit that prevents the screw head from stripping. Look for a torsion zone — a specially hardened area near the shank — that gives way in a controlled manner under overload, preventing bit breakage. Equally important are tight dimensional tolerances to ensure the bit fits form-fittingly in the screw without play.
Drive types at a glance:
– Cross-recess bits (PH) and Pozidriv bits (PZ): Both have a cross-shaped slot. The difference: Pozidriv (PZ) has additional small notches between the main axes, allowing a larger contact area and improved torque transmission. This makes the bit less likely to slip — especially useful for higher torque in furniture construction or assembly work.
– Hex bits (Allen): For hexagon socket screws, typical in mechanical engineering, bicycles, and garden furniture. The hexagonal shape transmits torque very efficiently and sits firmly. Variants with a ball end allow the tool to be angled.
– Torx bits (TX): Star-shaped drive with six rounded corners. Torx prevents the so-called cam-out effect – the bit being pushed out when tilted – and thus enables very high torques without slipping. Ideal for precision and safety-related screw connections, e.g., in automotive manufacturing or electrical appliances.
Drive sizes and compatibility: Common shanks are 1/4 inch (6.35 mm) for standard cordless screwdrivers, drills, and hand holders, as well as 5/16 inch (7.94 mm) for more robust bit sets. Bits with a hex shank fit universal holders and keyless chucks. Check before purchase whether your machine accepts the corresponding bit holder – 1/4 inch is usually standard. For finer work, there are also bits with a 4 mm shank for precision screwdrivers.
Bit sets and individual bits: Professionals often opt for complete sets that cover multiple drive types and lengths (e.g., 25 mm, 50 mm, 100 mm). DIYers can start well with a basic set of PH2, PZ2, TX20, TX25, and Hex 4 mm. A set reduces the number of tool changes and keeps the tool within reach. Look for sturdy storage, e.g., in clamshell cases or belt pouches – this keeps the bits organized and protected from dirt.
Popular bits
These three examples show typical applications: The Torx bit T45 with face hole is suitable for particularly tight screw connections, for example on vehicles or machines, where high torque is required and the bit must not slip. The TT45 with additional bore is a special version for security screws that cannot be loosened with a normal Torx bit – it is often used in public facilities or in vehicle construction. The Pozidriv PZ1is the standard for furniture assembly kits and electrical installations, as it bites deeper into the screw head than PH bits and transfers torque more evenly. When buying, pay attention to the exact size designation (e.g. PZ1, T45) and the length – short bits (25 mm) are for tight spots, longer ones (50 mm or 100 mm) for deep-set screw heads.
Frequently asked questions about bits
When should I use Pozidriv (PZ) instead of Phillips (PH)?
Pozidriv bits have additional grooves between the main axes, which create a larger contact surface. This allows torque to be transferred more evenly and the bit slips out less often. Use PZ bits when you have screws with a PZ profile in a screw set – this is typical for furniture assembly kits and many electrical appliances. PH bits (Philips), on the other hand, are intended for older screws and applications with lower torque. Never mix PH and PZ tools: a PH bit in a PZ screw does not fit positively and damages the screw head.
Which bit length is optimal for my work?
The length depends on the accessibility of the screw. Short bits (25 mm) are suitable for tight spaces and flat screw heads. Medium lengths (50 mm) are the all-rounder for most screwdriving tasks. Long bits (100 mm) are needed to reach deep-set or countersunk screws, for example in furniture bodies or coves. Note: very long bits can break more easily under high torque – in that case, it is better to work with a short bit and an extension.
What do I need to watch out for regarding compatibility with my cordless screwdriver?
Most commercially available cordless screwdrivers and drills have a quick-release chuck or a bit holder for 1/4 inch (6.35 mm) hex shanks. Bits with a 5/16 inch (7.94 mm) shank require a suitable holder – many professional machines have switching chucks that accept both. Check the specification on your machine before buying. Bits with a cylindrical shank (without hexagon) are suitable for older devices or hand holders. A universal holder with a magnetic insert makes changing easier and prevents loss.
Why is S2 steel recommended?
S2 steel is a high-alloy tool steel with very good hardness (typically 58-60 HRC) and sufficient toughness. It withstands high torques without wearing out. Bits made of S2 steel stay sharper and more precise longer than those made of simple chrome-vanadium steel. Also look for a torsion zone – an unhardened area that twists controllably under overload instead of breaking. This significantly extends the service life. For the occasional DIYer, cheaper bits are often sufficient, but for regular craft work, the investment in S2 steel is worthwhile.
Other tool categories
Bits are only part of your tool assortment. Depending on the project, other attachments or tools can be a useful addition:
- Drill bits – If you need to pre-drill holes for screws, wood drill bits, metal drill bits, or masonry drill bits are the right choice. They can be used with the same bit holder as bits.
- Sockets and tool attachments – For nuts and screws with external hexagon, you need sockets. This category includes suitable adapters and extensions for bits and screwdrivers.
- Tool Accessories – Here you will find holders, bit boxes, magnetic bit holders, and other helpers that bring order to your workshop and speed up your workflow.
If you are unsure which components are suitable for your machine, a look at the Tool category as a starting point will help. All areas such as construction tools, socket sets, and other accessories are bundled there.
In a nutshell
Bits made of S2 steel with a torsion zone and precise fit offer the best durability. For cross-slotted screws, use PH or PZ depending on the profile – Pozidriv optimizes torque transmission. Hex bits and Torx bits are designed for high torque and secure fit. Pay attention to the drive size (1/4 inch or 5/16 inch) and compatibility with your screwdriver. The 238 items in this category cover both professional and DIY needs – from individual bits to complete sets. Choose the length based on the driving angle and invest in quality if you work regularly.