Drill bit set Irwin 10502256, 10 pieces, 2.5 mm diameter, for metal/wood/plastic

Irwin 10502256 drill bit set includes ten 2.5 mm diameter twist drill bits designed for general-purpose drilling into metal, wood and plastic. Ground to DIN 338 standards with precision ground cutting edges and a ground flute, these bits deliver accurate positioning, fast chip removal and a clean hole finish. The bits have a universal 118° point angle and a cylindrical shank, supplied in a Quadro pack for convenient storage and repeated use in hand drills and drill drivers.

Advantages

The set provides multiple identical bits for repetitive drilling, repairs and assembly tasks, reducing downtime when bits wear or break. Precision ground cutting edges and ground flute design help achieve faster drilling and improved hole quality across a variety of materials. Manufactured to DIN 338 standards, the bits offer consistent geometry and reliable performance. The cylindrical shank ensures compatibility with most chucks and the 118° point shape reduces wandering on start-up.

Suitable for

• Drilling holes in soft metals such as aluminium and thin steel
• Creating pilot and through holes in wood and plywood
• Drilling plastics and composite materials
• Routine maintenance, assembly and repetitive production tasks
• Use with hand drills and drill drivers for general workshop work

Key specifications

• Type: twist drill bits, 10 pieces
• Diameter: 2.5 mm
• Overall length: 57 mm
• Point angle: 118° universal
• Shank: cylindrical
• Material/finish: ground quality, precision ground cutting edges
• Flute: ground flute for fast chip evacuation and accuracy
• Packaging: Quadro pack

How to use

Select a suitable drill speed and clamp the workpiece securely before drilling. Fit a 2.5 mm drill bit into the drill chuck and tighten firmly. Start drilling at low speed to establish the hole, then increase speed as appropriate for the material. Apply steady pressure without forcing the bit; allow the cutting edges to remove material. For metals and plastics, use cutting fluid or coolant where recommended to extend bit life. Replace bits from the set as they wear to maintain hole quality.

Usage recommendations

For best results, match drill speed to material: higher speeds for wood and plastics, lower speeds for metals. Use light lubrication on metals and clear chips regularly to avoid clogging the flute. Store bits in the supplied Quadro pack to preserve ground edges and prevent damage.