US No. 58L Busch Carbide Straight Fissure (Cylinder) Long Bur | Busch No. 21L 012 – FG | Pack of 6
The carbide cylinder fissure dental bur from Busch & Co. GmbH is a precision-engineered rotary cutting instrument designed for demanding restorative and operative dentistry procedures. Manufactured in Germany to exacting standards, this bur delivers consistent, controlled cutting performance in the most challenging clinical environments.
Product Details
This instrument is classified as a Carbide, Cylinder Flat, Excavating and Fissure Bur, engineered specifically for long-reach applications requiring accuracy and stability. It is supplied in a convenient pack of 6, ensuring continuity across multiple procedures.
- Type: Carbide, Cylinder Flat, Excavating and Fissure Bur
- US No.: 58L
- ISO Classification: 500 314 110 006 012
- Shank: FG (Friction Grip)
- Shape: Cylinder Long
- Pack Size: 6 units
Applications
The carbide cylinder fissure dental bur is well-suited for the following clinical procedures:
| Cavity/Fissure Preparation — Opening, extending and shaping cavities and fissures with controlled removal of enamel and dentin. |
Instrument Dimensions
| Head Ø | 1.2 mm (ISO size 012) |
|---|---|
| Shank | FG (Friction Grip) — 1.60 mm Ø, 19 mm overall length (ISO 314) |
Per ISO 6360, the size number is the maximum head diameter in tenths of a millimeter. See our Busch Bur Size Chart for the full size conversion table, shank codes, and color ring guide.
Why Choose This Bur?
As a carbide cylinder fissure dental bur, this instrument benefits from the renowned precision of German manufacturing. The tungsten carbide construction ensures long-lasting sharpness and resistance to wear, making it a reliable choice for high-volume clinical settings. The long cylinder geometry provides excellent depth control, particularly valuable during fissure and cavity preparation workflows.

FAQ
What shank type does this bur use? This bur features an FG (Friction Grip) shank, compatible with standard high-speed handpieces.
How many burs are included? Each pack contains 6 individual burs, offering excellent value for busy dental practices.
What is the ISO classification? The ISO classification is 500 314 110 006 012, allowing precise identification and reordering.
Is this a genuine German-made product? Yes. This carbide cylinder fissure dental bur is manufactured by Busch & Co. GmbH in Germany.
Compare With
| Manufacturer | Reference |
|---|---|
| Komet (Gebr. Brasseler) | H21L.314.012 |
| Brasseler USA | H21L.31.012 |
| Meisinger | HM21L-012-FG |
| Alpen (Coltène) | R10058L |
Manufacturer literature: Busch catalogs and product brochures for this line are available in our Busch Burs Catalog Library.

