Square Drive & Combo Drive Screws

Make Your Shop More Efficient

Using a single driver bit for most of the screws in your woodworking shop can save time, reduce mistakes, and improve productivity. The Square Drive #2 bit fits both #8 and #10 screws, which account for the majority of screws used in woodworking, cabinetmaking, and furniture construction.

Benefits include:

• Faster bit selection
• Fewer stripped screws
• Reduced downtime
• Lower tooling costs
• Easier training for new employees

McFeely's color-coded Square Drive system helps users quickly identify the correct bit size. Our bits are specifically matched to our screws for a secure fit and reliable performance.

Why Different Screw Drives Affect Shop Efficiency

The challenge with many screw systems is choosing the correct driver bit. Torx™, Phillips®, and Square Drive screws are available in multiple sizes, making visual identification difficult.

The Square Drive system simplifies the process:

• Four drive sizes cover most applications.
• The #2 Square Drive bit handles the majority of woodworking screws.
• Color-coded bits make identification easy.
• Square Drive screws stay securely attached to the bit during installation.

For many shops, a single Red Square Drive bit can replace several commonly used Torx bit sizes.

Combo Drive Screws

Combo Drive screws are designed to work with both Phillips and Square Drive bits.

Advantages include:

• Compatible with multiple driver types.
• Better bit engagement than Phillips alone.
• Convenient for installations that may require future adjustment.

Combo Drive screws are commonly used with washer-head fasteners where the screw remains visible and accessible after installation.

For maximum performance, choose screws from manufacturers with a proven history of quality. While Combo Drive screws offer versatility, they generally do not provide the same drive strength as Square Drive or Torx systems.

Coated Screws

Coated screws are designed primarily for outdoor applications where corrosion resistance is important.

Typical uses include:

• Deck construction
• Outdoor furniture
• Exterior trim
• Landscaping projects

For indoor projects such as cabinets, furniture, and stair construction, coated screws are usually unnecessary.

Because protective coatings can affect bit engagement, some coated Square Drive screws may require a slightly smaller driver bit. Torx screws are generally less affected by coatings because of their tapered drive design.

Square Drive screws feature straight sidewalls that help align the bit and reduce the likelihood of driving at an angle. For situations where angled driving is necessary, ball-tip Square Drive bits can provide additional flexibility.

Stainless Steel Screws

Stainless steel screws offer excellent corrosion resistance and are often the preferred choice for outdoor and marine environments.

Important considerations:

• Softer than hardened steel screws.
• More prone to cam-out if improperly driven.
• Pilot holes are strongly recommended.
• Most stainless steel screws are only weakly magnetic or non-magnetic.

Square Drive stainless steel screws provide excellent bit retention and make installation easier, especially when working overhead or in hard-to-reach locations.

Dry Lube Screws

Dry Lube screws are steel fasteners coated with a proprietary dry lubricant that reduces driving torque without creating residue that interferes with dust collection systems.

Benefits include:

• Easier driving
• Reduced friction
• Less wear on tools
• Clean handling
• Stain-friendly brown finish that blends with wood

Ideal for:

• Cabinets
• Furniture
• Closets
• Stair construction
• Museums
• Theaters
• Architectural millwork

Dry Lube screws are intended for indoor use and should not be used in exterior applications.

Torx™ Drive Screws

Torx™ (Star Drive) screws are widely used in construction, timber framing, and heavy-duty fastening applications.

Advantages include:

• High torque transfer.
• Strong resistance to cam-out.
• Excellent performance with power tools.
• Well suited for automated assembly systems.

Common applications include:

• Timber screws
• Structural screws
• Lag screws
• Deck construction

Because Torx screws are available in many drive sizes, manufacturers often include a matching bit with each package. These included bits are typically intended for limited use and may wear quickly under heavy production conditions.

Torx drive systems are popular on job sites because they tolerate angled driving well and perform effectively in demanding field conditions.

Why Woodworkers Prefer Square Drive

Square Drive screws remain a favorite among cabinetmakers, furniture builders, and woodworking professionals because they:

• Stay attached to the bit.
• Reduce dropped screws.
• Provide excellent control.
• Require fewer bit changes.
• Improve installation speed.

Most Square Drive wood screws use only a few driver sizes, simplifying inventory and reducing confusion in the shop.

When a Square Drive bit begins to wear, the tip can often be lightly ground to restore sharp edges until a replacement is available.