Drill bits set Proline 77803 — 3 pieces

Proline 77803 — 3 pieces is a compact set of drill bits intended for general drilling tasks in metal, steel sheets, plastics, wood and other common materials. Manufactured from 4241 HSS and coated with titanium nitride, these bits deliver improved wear resistance and faster heat dissipation during drilling. The set is supplied with a roller shank compatible with most hand drills and drill drivers, and the self-centring tip design prevents slipping on rounded or slippery surfaces while producing clean, burr-free hole edges.

Advantages

The combination of 4241 high-speed steel and titanium nitride coating extends tool life and reduces friction, allowing for more consistent performance in harder materials. Self-centring geometry ensures the drill does not slide on oval or curved surfaces and helps maintain precise hole placement. Rapid heat dissipation reduces the risk of overheating during continuous use. The roller shank improves grip in the chuck for stable drilling and easier bit changes.

Suitable for

• Home repairs and maintenance
• Assembly and installation tasks
• Drilling in metal and steel sheets
• Drilling through plastics and light woods

Key specifications

• Material: 4241 high-speed steel (HSS)
• Surface finish: titanium nitride coating
• Shank type: roller shank for improved chuck grip
• Tip design: self-centring to reduce slipping on rounded surfaces
• Performance: rapid heat dissipation for drilling in harder materials
• Hole quality: clean, burr-free hole edges
• Contents: set of 3 drill bits

How to use

Select the drill bit that matches the diameter required for your task and securely insert the roller shank into a compatible hand drill or drill driver. Start drilling at low speed to allow the self-centring tip to locate the intended position, then increase speed according to the material being worked on. Apply steady, moderate pressure and withdraw periodically when drilling thicker or harder materials to allow chips to clear and to promote cooling. Use cutting fluid or coolant where appropriate for metal drilling to extend bit life.

Usage recommendations

For best results when drilling metal or steel sheets, clamp the workpiece and mark the drilling point before starting. Use appropriate personal protective equipment such as safety glasses and gloves. Store the bits in a dry place to prevent corrosion and inspect them for wear before use; replace any bit that shows significant wear or damage to maintain hole quality and reduce the risk of breakage.