If you’re in the market for a loose mortise and tenon joiner, Festool’s Domino line has two standout models: the DF-500 and the XL DF-700. They share the same core concept—fast, clean mortises made with a rotating and oscillating cutter paired with floating tenons—but they differ in what jobs each is best suited for. Here’s a breakdown to help you figure out which tool fits your workshop needs best.

Key Similarities

Both models include adjustable fence height and angle (0-90°) with positive stops at standard angles. Each allows you to adjust mortise width for either a snug or slightly forgiving fit, and both are designed to work with Festool’s system of cutters, tenons, and accessories like cross stops and trim stops. As you’d expect from Festool, they’re built with strong construction and precise engineering.

What Sets Them Apart

Here are the main differences between the DF-500 and XL DF-700, especially in terms of cutting capacity, depth, size of workpieces, and typical applications.

DF-500

• Cutter and tenon size range: 4, 5, 6, 8, 10 mm
  
  
• Maximum plunge depth: about 28 mm
  
  
• Works best with material thicknesses from around 5 mm to 30 mm
  
  
• Powered by a 420-watt motor, with higher no-load RPM for clean, fast cuts
  
  
• Lightweight and easy to handle, making it great for site work or smaller joinery
  
  
• Ideal for cabinetry, drawers, panel work, and other small to medium projects
  
  

XL DF-700

• Cutter and tenon size range: 8, 10, 12, 14 mm
  
  
• Maximum plunge depth: about 70 mm
  
  
• Works well with thicker material, up to around 50 mm
  
  
• More powerful 720-watt motor with plenty of torque
  
  
• Heavier and larger, designed for more demanding applications
  
  
• Best suited for doors, large furniture, tables, gates, and other big projects requiring strong, deep joints
  
  

Which Model Should You Choose?

If most of your work is cabinetry, fine furniture, or you often work with panels and thinner stock, the DF-500 will likely be the better option. It’s lighter, more portable, and offers plenty of flexibility for small to medium projects.

If you regularly build large furniture, entry doors, gates, or work with very thick hardwoods, the XL DF-700 is the right choice. Its ability to handle large tenons and deep mortises gives you the strength needed for heavy-duty joinery.

Practical Tips

• Choose tenon size relative to your stock thickness. A common rule is to make the tenon thickness about one-third of the board’s thickness.
  
  
• When working with thick materials and deep mortises, make sure to support the tool properly for stability.
  
  
• Keep dust collection connected for cleaner cuts and longer cutter life.
  
  
• Use matching accessories for repeatable precision on production runs.
  

Both models excel at creating strong, accurate mortise and tenon joints quickly and reliably. The choice comes down to the scale of your projects. For most small and medium woodworking tasks, the DF-500 is more than enough. For larger, heavy-duty joinery, the XL DF-700 provides the capacity and power you’ll need.