Mini Hand Drill Bit Set: Choosing the Right Size
By Newtype: Gundam Model Kits / Gunpla / Paint / Tools | Published: 2026-10-25
Category: Buying Guides
Learn how to select the correct mini hand drill bit size for your Gunpla or model kit project, with practical tips and trade-offs.
Quick answer
Choose a mini hand drill bit set that includes sizes from 0.8 mm to 3.0 mm so you can match the bit to the hole you need: small bits for panel lines and detail work, larger bits for peg holes and metal rod inserts.
Why size variety matters in a hand drill set
A single bit size will only cover one kind of hole. Model building, especially Gunpla modification, demands holes for panel lines, polycaps, magnets, screws, or metal rods. A set with 10 sizes from 0.8 mm to 3.0 mm lets you pick the exact bit for each task without buying separate bits later.
The trade-off: a large set costs more upfront than a single bit, but it saves money and frustration when you need a size you don't have. The Mini Hand Drill Bit Set from Newtype includes those 10 common sizes in one compact case.
Matching bit size to common model tasks
Panel line scribing and small detail holes (like antenna mounting points) work best with bits 0.8 mm to 1.2 mm. For polycap holes or screw pilot holes, 1.5 mm to 2.0 mm is a safe range. Larger tasks such as drilling for metal rods or magnets call for 2.5 mm or 3.0 mm.
One common mistake: using a bit that is too large can crack thin plastic or widen a hole beyond what the part can hold. Start with the smallest bit that fits the part, then step up if needed.
Decision rules for choosing a bit size
- 0.8 mm – 1.2 mm: Use for panel line scribing, antenna holes, and small detail pins. These bits are fragile; apply light pressure and drill slowly. Start with the smallest bit that fits the part.
- 1.5 mm – 2.0 mm: Ideal for polycap holes, screw pilot holes, and small metal rod inserts. These sizes balance strength and precision.
- 2.2 mm – 3.0 mm: Best for larger metal rods, magnets, or structural mods. Drill a pilot hole with a smaller bit first to avoid cracking plastic.
Product facts
- Mini Hand Drill Bit Set: Includes 10 drill bits: 0.8 mm, 1.0 mm, 1.2 mm, 1.5 mm, 1.8 mm, 2.0 mm, 2.2 mm, 2.5 mm, 2.8 mm, and 3.0 mm. Handle length approximately 9 cm. This range covers nearly all common model drilling needs, from fine panel lines to larger support holes, so you don't need to buy multiple sets.
Mini Hand Drill Bit Set
Who should buy this set
Best for
- Modelers who do Gunpla modification, custom builds, or scratch-building and need a range of hole sizes
- Beginners who want one set that covers common drilling tasks without buying bits individually
Not for
- Modelers who only need one specific size for a single project—a single bit may be cheaper
- Those working with metal parts requiring carbide or cobalt bits—these are for plastic and resin
