IGM FD300 is a half-blind dovetail jig with a solid steel body and a 4 mm laser-cut galvanized sheet metal template, with a working width of 305 mm. The set includes the half-blind dovetail template, the 15.8 mm guide bushing and the 12.7 mm 14° dovetail router bit with 8 mm shank. Made in the Czech Republic. Distributed in Italy by Krollit, official IGM distributor since 2007.
- Working width: 305 mm
- Compatible workpiece thickness: 11–25 mm
- Dovetail angle: 14°
- Dovetail size: 12.7 mm
- Body: solid steel
- Template: 4 mm galvanized sheet metal, laser cut
- Included guide bushing: 15.8 mm x 4 mm, 50 mm base, 2 screws
- Included router bit: dovetail 12.7 x 12.7 mm, 14°, 8 mm shank
- Compatible router base diameter: max. 180 mm
- Clamps: steel, also suitable for large workpieces
- Adjustment stops for quick and repeatable workpiece positioning
- Dedicated threaded holes for side stops
- Optional accessories available: templates for box joints, through dovetails, small lapped dovetail
- Country of production: Czech Republic
Who uses the FD300 and what it is used for
The IGM FD300 jig is used by woodworkers and woodworking hobbyists to make half-blind dovetail joints on solid wood drawers, where the joint must not be visible from the front. With optional templates, the same jig can produce box joints for drawers and containers, as well as through dovetails for furniture, jewelry boxes and solid wood containers where the joint becomes part of the decoration. The 305 mm width covers standard kitchen and bathroom cabinet drawers. The steel clamps allow workpieces up to 25 mm thick to be locked securely without slipping during routing.
Who the FD300 is suitable for
| Profile |
Compatibility |
Reason |
| Woodworker producing solid wood drawers |
Suitable |
Half-blind dovetail is the standard joint for drawers — the joint is not visible from the front |
| Hobbyist with handheld router |
Suitable |
Simple setup with adjustment stops, router bit and bushing included — ready to use without additional purchases |
| User with router base diameter over 180 mm |
Not suitable without accessory |
The compatible base diameter is max. 180 mm — for larger bases, the FRB170 universal base is required, code FRB170, not included |
Not suitable for: joints on MDF or chipboard panels — the FD300 jig is designed for solid wood and plywood; on fiberboard panels, the dovetail profile does not hold over time due to the structure of the material.
Standard equipment
- Complete FD300 jig with steel body and clamps
- Template for 12.7 mm half-blind dovetail in 4 mm galvanized sheet metal
- Guide bushing D 15.8 mm x 4 mm with 50 mm base and 2 fixing screws
- Dovetail router bit 12.7 x 12.7 mm, 14° angle, 8 mm shank
- Instruction manual
Technical specifications
| Working width | 305 mm |
| Compatible workpiece thickness | 11–25 mm |
| Dovetail angle | 14° |
| Dovetail size | 12.7 mm |
| Body | Solid steel |
| Template | 4 mm galvanized sheet metal, laser cut |
| Included guide bushing | D 15.8 mm x 4 mm, 50 mm base, 2 screws |
| Included router bit | 12.7 x 12.7 mm, 14°, 8 mm shank |
| Max. router base diameter | 180 mm |
| Clamps | Steel |
| Country of production | Czech Republic |
| Accessory for bases >180 mm | FRB170 universal base, not included |
Frequently Asked Questions
What does half-blind dovetail mean and when is it used?
A half-blind dovetail is a joint where the interlocking profile is not visible from the front face of the workpiece. It is the standard joint for solid wood drawers: the drawer front completely hides the joint, while the inside shows the dovetail profile. It is stronger than a simple biscuit or dowel joint and faster to make than a hand-cut through dovetail.
My router has a base larger than 180 mm — can I use the FD300?
Yes, but the transparent IGM FRB170 universal base is required, code FRB170, not included in the set. The FRB170 attaches to the router base, is centered and accepts the 15.8 mm IGM guide bushing. Contact Krollit at +39 0825-1494022 to check availability of the FRB170.
What other types of joints can be made with the FD300?
With optional templates, the same FD300 jig can produce box joints, small lapped dovetails and through dovetails. The templates are purchased separately and mounted on the same steel structure of the jig. Contact Krollit to check availability of optional templates compatible with the FD300.
Can the included router bit be resharpened?
The 12.7 mm dovetail router bit included in the set is made of carbide (HW). Resharpening is possible at a specialized center, but the 14° geometry requires dedicated equipment. To replace the included bit with a new one, the reference is: 12.7 x 12.7 mm dovetail router bit, 14° angle, 8 mm shank.
What minimum and maximum workpiece thickness can the FD300 handle?
The FD300 jig is compatible with workpieces from 11 to 25 mm thick. Below 11 mm, the workpiece is not held correctly by the clamps. Above 25 mm, the cutting height of the included bit (12.7 mm) is not sufficient for a proportional joint — in that case, router bits with greater cutting height should be considered.
Is the jig compatible with all handheld routers?
The FD300 is compatible with handheld routers with a base diameter up to 180 mm. For routers with a larger base, the FRB170 universal base is required. Some routers do not directly support the 15.8 mm IGM bushing: in these cases, the FRB170 solves the adaptation difference without permanent modifications to the machine.
