Tri-Square & Screwdriver Bits

Tri-square (also known as triple square or XZN) and screwdriver bits are essential tools for automotive service professionals. Triple square bits feature a unique 12-point design that provides superior grip on specialized fasteners commonly found in European vehicles, particularly for brake calipers, engine components, and suspension systems. Standard screwdriver bits include Phillips, slotted, Torx, and Pozidriv designs for a wide range of automotive applications.

Triple square bits are typically required for:

• Brake caliper mounting bolts on many European vehicles
• Engine head bolts and timing components
• Axle bolts and CV joint fasteners
• Door handle screws and interior trim fasteners
• Transmission and drivetrain components

Standard screwdriver bits handle everyday tasks including electrical connections, dashboard removal, door panels, and general vehicle disassembly work across all vehicle makes and models.

When selecting bits for your shop, consider:

• Size Range: Triple square sets typically include sizes ranging from 4mm to 18mm, with larger sizes often featuring tamper-proof designs
• Drive Type: Hex drive sizes generally range from 1/4" to 3/4" depending on bit size, with larger bits requiring larger drive sizes for adequate torque transfer
• Material Construction: Quality bits are typically manufactured from hardened steel alloys for durability and resistance to wear
• Impact Rating: Some bits are specifically designed for impact driver use, while others are intended for hand tools only
• Storage: Sets may come with vinyl holders, cases, or bit driver handles for organization and portability

Triple square bits require proper engagement to prevent fastener damage. Always ensure the bit is fully seated in the fastener before applying torque. The 12-point design distributes force more evenly than traditional hex sockets, reducing the risk of rounding when working with tight or corroded bolts. For damaged fasteners, specialized designs with rounding prevention technology can provide significantly more grip than standard bits.

Comprehensive bit driver sets typically include a variety of bit types in one package—Torx, Phillips, Pozidriv, slotted, hex, and square drive sizes. These sets generally range from around 30 pieces and provide versatility for technicians who need multiple bit types readily available. A quality bit driver with quick-change capability and an organized storage system helps improve workflow efficiency in busy shop environments.

Note: Specifications vary by model. Always check individual product listings and manufacturer documentation for exact details regarding size ranges, drive types, material specifications, and compatibility with impact tools.