Drill bit set GEKO G40091 — cylindrical bits 10, 5, 6, 8, 4 mm

GEKO G40091 is a compact set of cylindrical drill bits that contains five commonly used diameters: 10 mm, 5 mm, 6 mm, 8 mm and 4 mm. The set is intended for general drilling tasks and provides a selection of sizes suitable for creating holes in wood, plastics and thin metal sheets when used with an appropriate drill and cutting speed. The bits are delivered together to offer a practical choice of diameters for everyday repair, woodworking and DIY projects.

Advantages

The set groups five standard diameters in one kit, reducing the need to purchase individual bits separately. Cylindrical shanks ensure compatibility with a wide range of drill chucks. The range of sizes covers small to medium hole diameters commonly required in repair and assembly tasks. The compact assortment makes it easy to store and carry alongside other hand and power tools.

Suitable for

• Drilling holes in soft and hard woods
• Working with plastics and composite materials
• Light metal drilling such as thin sheet metal and aluminium
• General home repair and assembly tasks
• Woodworking and DIY projects requiring multiple hole sizes

Key specifications

• Included diameters: 10 mm, 5 mm, 6 mm, 8 mm, 4 mm
• Shank type: cylindrical
• Intended materials: wood, plastics, light metals (thin sheets)
• Pack contents: five drill bits in a compact set

How to use

Select the drill bit diameter appropriate for the hole required and secure it in the drill chuck, ensuring the cylindrical shank is held firmly. Adjust drill speed and feed rate according to the material being drilled: lower speeds for metals and higher speeds for wood and plastics, while applying steady pressure. Use cutting fluid or lubrication when drilling metals to extend bit life and maintain cutting performance. After drilling, clean the bits of debris and store them in their kit to prevent damage and maintain sharpness.

Usage recommendations

For best results, match drill speed and feed to the material: use slower speeds and occasional lubrication for metals, moderate speeds for plastics to avoid melting, and higher speeds with consistent pressure for wood. Inspect bits for wear and replace when cutting becomes inefficient to avoid poor hole quality and potential damage to workpieces.