Dormer A777 HSCo Heavy-Duty Jobber Drill 8.50mm OL: 117mm WL: 75mm | A7778.5

Dormer A7778.5 HSCo Heavy-Duty Jobber Drill Bit (8.50mm, 117mm OL / 75mm WL)

Dormer A7778.5 heavy-duty jobber drill bit is designed for drilling metal where a tough, heat-resistant cutting tool is required for consistent results. Made for trade and workshop use, the A777 HSCo jobber drill format offers a practical overall length for general drilling tasks across common metalworking operations.

This 8.50mm metal drill bit features a 117mm overall length with a 75mm working length, helping you reach through typical section sizes while keeping the tool manageable in hand-held and machine setups.

Key Features

• HSCo construction: Cobalt alloy high-speed steel design for demanding metal drilling applications where heat can build up.
• Heavy-duty jobber profile: General-purpose jobber length format suited to workshop and on-site drilling tasks.
• 8.50mm diameter: Ideal for creating accurate clearance holes and preparing work for common fasteners and fittings.
• 75mm working length: Useful reach for drilling through many typical metal thicknesses and profiles.
• 117mm overall length: Balanced length for control and access in a wide range of drilling setups.

Specifications at a glance