Magswitch MagJig 150 vs INCRA I-BOX: Box Joint Jigs Compared
By Infinity Cutting Tools | Premium Woodworking Tools ... | Published: 2026-10-26
Category: Comparisons
Compare the Magswitch MagJig 150 and INCRA I-BOX for box joints. Learn which jig fits your table saw or router table based on workholding force and joint versatility.
Quick answer
Choose the INCRA I-BOX if you need a dedicated jig for fast, decorative box joints on a table saw or router table. Choose the Magswitch MagJig 150 if you want a magnetic workholding clamp that lets you build custom fixtures for box joints and other tasks.
Dedicated jig vs. modular workholding
The INCRA I-BOX is a purpose-built jig designed specifically for creating a wide range of box joints and finger joints. Its setup is fast for basic joints, and it also offers advanced capability for unique decorative patterns. If box joints are a regular part of your work, this jig streamlines the process.
The Magswitch MagJig 150, on the other hand, is a 150-lb switchable magnetic clamp. It is the heart of a modular workholding system. You can use it to attach custom fixtures to any cast iron table saw top or steel fence. This makes it ideal if you already have a preferred jig design or want the flexibility to switch between different tasks.
Joint variety and complexity
The INCRA I-BOX is built to produce a stunning variety of box joints and finger joints, from simple through dovetail-like decorative patterns. Its design includes features that allow for quick changes between joint sizes and styles.
The Magswitch MagJig 150 does not create joints by itself. It provides a strong, precise, and repositionable clamping point. You would need to build a custom fence or jig around it to cut box joints. This approach gives you total control over the joint design but requires extra fabrication time.
Trade-offs at a glance
- Joint versatility: INCRA I-BOX: Ready for basic and decorative box joints out of the box. MagJig 150: Requires a custom jig to cut box joints, but you can design any joint pattern you want.
- Setup speed: INCRA I-BOX: Fast setup for basic joints; dial in size and cut. MagJig 150: You must first build or attach a fence/jig to the magnetic base, which takes extra time.
- Multi-use potential: INCRA I-BOX: Dedicated to box joints only. MagJig 150: Can be used for many tasks (e.g., featherboards, stop blocks, custom fixtures) beyond box joints. If you need a one-trick pony for box joints, choose the I-BOX. If you want a versatile clamp that can also make box joints, choose the MagJig 150.
Product facts
- INCRA I-BOX - Box Joint Jig For Table Saw & Router Table: The INCRA I-BOX features fast setup for basic joints, plus advanced capability for unique decorative joints. You can quickly produce standard box joints and also experiment with decorative patterns without buying extra accessories.
INCRA I-BOX - Box Joint Jig For Table Saw & Router Table - Magswitch MagJig 150: The Magswitch MagJig 150 is a switchable magnetic clamp with 150 lbs of workholding force, designed as the heart of the Magswitch Workholding System. It lets you build custom fixtures that attach instantly to any cast iron surface, giving you flexibility beyond just box joints.
Magswitch MagJig 150
Which jig fits your shop?
Best for
- Woodworkers who frequently make decorative box joints and want a dedicated, fast-setup jig
- Users who want to create a wide variety of finger joints without building custom fixtures
Not ideal for
- Those who need a single tool that can also serve as a general-purpose workholding clamp
- Woodworkers who prefer to design and build their own jigs from scratch
