Japanese Wood Chisel Set Blue Steel A-10
VAT, import taxes, customs duties, tariffs, and related fees are NOT included in our prices. The shipping company charges you these fees, after shipment.
Manufacturer's lead time is usually 1-4 weeks.
Acual handle color is different from the photo, depending on handle materials.
SUMMARY
Built in Miki. Chosen for the edge.
Bring Japanese blade-making expertise to your workbench with the Koyama A-10. Made by Koyama Hardware Co., Ltd., this Blue Steel chisel set combines a keen, long-lasting edge with a thin tip that bites readily into wood. From forging and heat treatment to sharpening and handle fitting, production is handled in-house in Miki, Japan. For woodworkers who value how a tool cuts, not simply where it comes from.
FEATURES
- Blue Steel cutting edge: Delivers excellent sharpness and long-lasting edge retention.
- Special forging: Strengthens the blade’s U-shaped steel reinforcement to help resist chipping.
- Thin tip: Enters wood readily for efficient cutting.
SET CONTENTS
- 5 pcs set: 9, 15, 24, 30, 36 mm
- 10 pcs set: 3, 6, 9, 12, 15, 18, 24, 30, 36, 42 mm
Available with Red oak, Silverberry, or Ebony handles. Select your preferred set size and handle material.
The lead time will be confirmed after receiving your order. Usually 1-2 weeks.
KOYAMA CHISEL COMPARISON
Compare seven chisel sets, the replaceable-blade chisel body, its replacement blades, and the interior-work chisel. Scroll horizontally to view each table on smaller screens. Click the blue underlined model names to view each product.
Woodworking chisel sets
All seven sets offer 5 pcs (9, 15, 24, 30, 36 mm) or 10 pcs (3, 6, 9, 12, 15, 18, 24, 30, 36, 42 mm), with Red oak, Silverberry, or Ebony handles.
| Spec. | A-1 | A-2 | A-3 | A-6 |
|---|---|---|---|---|
| Blade steel | Swedish Steel | High-speed Steel | Yasuki Steel | White Steel No.2 (Shirogami No.2) |
| Key features | Easy to sharpen | High-speed Steel set | Yasuki Steel set; grade not specified | Spheroidizing annealing, quenching and tempering |
| Spec. | A-7 | A-8 |
A-10 This product |
|---|---|---|---|
| Material / construction | Traditional forging; steel grade not specified | Hybrid Steel | Blue Steel |
| Key features | Polished by skilled craftsmen; key areas file-finished | Hybrid Steel set | Keen, long-lasting edge; specially forged U-shaped steel reinforcement; thin tip |
Replaceable-blade and interior-work chisels
| Spec. | Replaceable-blade chisel | Replacement blade | Interior-work chisel |
|---|---|---|---|
| Product type | Chisel main unit | Replacement blade only; for the replaceable-blade chisel | Interior-work chisel |
| Blade steel | Alloy steel / Blue Steel / High-speed Steel | Alloy steel / Blue Steel / High-speed Steel | High-strength alloy |
| Blade widths (mm) | 3, 6, 9, 12, 15, 18, 21, 24, 30, 36, 42 | 3, 6, 9, 12, 15, 18, 21, 24, 30, 36, 42 | 3, 6, 9, 12, 15, 18, 21, 24, 30, 36, 42 |
| Handle | Red oak | Not applicable (blade only) | White oak |
| Use / maintenance | Woodworking; blade replaced using a 3 mm hex wrench | Restores the cutting edge by replacing the blade | Interior work, carpentry and scraping |
ABOUT KOYAMA
Founded in 1955 in Miki, Hyogo, Japan, Koyama Hardware Co., Ltd. manufactures chisels, hand planes, saws, and circular saw blades. The company combines traditional blade-making skills with precision forging, machining, and laser processing.
Its chisels are produced in-house through forge welding, forging, heat treatment, grinding, sharpening, and handle fitting. This integrated approach brings Miki's blade-making tradition to the woodworking tools you use at the bench.
Blade-making process
Koyama’s chisel-making process includes forge welding and hot forging of blade steels such as Yasuki steel and special high-speed steel, followed by spheroidizing annealing under a nitrogen purge. The blades are then coated with tonoko powder and water-quenched, in a process also used in Japanese swordmaking, before tempering, grinding, and sharpening.