Screwdriver bit set Proline 10821 — 2 pcs, 100 mm length

Proline 10821 is a set of two 100 mm screwdriver bits designed for manual and powered screwdriving tasks where extra reach is required. Each bit in the kit has a 100 mm length to access recessed or deep screw positions and is compatible with standard bit holders and quick-change chucks. The compact two-piece set is intended for assembly, repair, and maintenance work across a range of materials and fastener types.

Advantages

The 100 mm length provides improved access to screws in tight or recessed locations without compromising control. Construction from hardened tool steel ensures durability and wear resistance under repeated use. Compatibility with standard 1/4" hex bit holders and power driver adapters makes the set versatile for hand tools and cordless screwdrivers alike. The two-piece packaging simplifies storage and selection when working on small jobs or mobile service tasks.

Suitable for

• Accessing screws in recessed or deep mounting points
• Assembly of furniture, cabinets, and fittings
• General repair and maintenance tasks
• Use with hand drivers and cordless screwdrivers

Key specifications

• Quantity: 2 pieces
• Length: 100 mm each
• Drive type: standard 1/4" hex shank compatibility
• Material: hardened tool steel (wear-resistant)
• Intended use: manual and powered screwdriving

How to use

Insert a bit into a compatible 1/4" hex bit holder, quick-change chuck, or the bit socket of a cordless screwdriver. Ensure the bit is seated securely before applying torque. For hand use, fit the bit into a bit driver or handle and engage the screw head with steady pressure, maintaining alignment to prevent cam-out. When using a power driver, select an appropriate torque setting and operate at controlled speed to avoid damage to fasteners and surrounding workpieces.

Usage recommendations

Match the bit tip to the screw head type and size for best engagement; avoid excessive torque on worn fasteners. Store the bits in a dry place to prevent corrosion and inspect tips regularly for rounding or wear, replacing bits when necessary to maintain performance and reduce risk of damage to fasteners.