The flame bits compared here come in 1.8mm, 2.1mm and 2.3mm sizes. Size is only one difference: the selection also includes soft and medium grit options, plus a three-piece 2.1mm pack. Compare those details separately before choosing a replacement or adding another option to your kit.
Compare the listed specifications
| Product | Listed size | Listed length | Grit | Pack quantity |
|---|---|---|---|---|
| Blue Flame E File Nail Drill Bit Size 2.3mm | 2.3 mm | Not specified | medium | Not specified |
| Blue Flame Safety E File Nail Drill Bit Size 2.3mm | 2.3 mm | Not specified | medium | Not specified |
| E File Flame Nail Drill Bits Set 2.1 mm x 3 | 2.1 mm | Not specified | soft | 3 |
| Flame E File Nail Drill Bit Size 2.1mm Red | 2.1 mm | 7.2 mm | soft | Not specified |
| Flame E File Nail Drill Bit Size 1.8mm | 1.8 mm | 8.8 mm | soft | Not specified |
| Flame E File Nail Drill Bit Size 2.3mm | 2.3 mm | Not specified | soft | Not specified |
These are the selected products, not a complete inventory. A missing specification is left open rather than inferred from another listing.
Size and working length are separate measurements
The individual 1.8mm flame bit is listed with an 8.8mm working length. The individual 2.1mm red flame bit has a listed working length of 7.2mm. These two records show why a larger stated size should not be taken to mean a longer working head.
The selected 2.3mm listings do not state a working length. Neither does the three-piece 2.1mm pack. The 7.2mm measurement belongs to the individual 2.1mm red bit; it should not be applied to the pack simply because both listings say 2.1mm.
If you are replacing a bit you already use, start with its product reference and compare the listed size and working length where both are available. A missing length does not establish that two items match.
The 2.3mm options do not all have the same grit
The selected 1.8mm bit, individual 2.1mm red bit and three-piece 2.1mm pack are described as soft grit. At 2.3mm, the selection includes a soft grit flame bit as well as medium grit blue flame and blue flame safety bits. Choosing 2.3mm therefore does not settle the grit choice.
The blue flame safety listing specifies diamond-coated steel. The other listings use diamond terminology without supplying the same construction detail. That difference in wording does not establish a different core material, greater durability or better performance for the safety version.
An individual replacement or a three-piece pack
The 2.1mm pack is described as three flame bits of the same stated size and soft grit. It is not presented as a selection of three different sizes. Choose it when that stated combination matches the items you want to buy together; compare the individual listings if you need a different size or grit.
These product records provide a way to narrow your choices, but they do not rank the bits by precision or establish that one is best for every technician. Use the linked listings to check the details of the particular item you are ordering.
Related guides
Products in this guide
Product photographs are shown individually and are not to the same scale.
