Key Features
Loose tenons with a drill Cuts mortises for loose tenon joinery using a standard drill, so you can leave the router setup on the shelf and still get clean, hidden joints. Auto step-down cutting The auto-indexing step-down mechanism drops the cutter tip by 1/16 in per pass, helping you stay controlled and consistent instead of hogging out too much at once. Quick, repeatable setup Micro adjustment screws let you dial in mortise width for the fit you want, and the mini work surface makes clamping fast for panels and 90-degree joints.
Overview
Kreg Tool KLTJ100 MortiseMate Loose Tenon Jig is a drilling jig built for cutting mortises for loose tenon joinery. This is a loose tenon mortising jig designed for making strong, hidden wood joints using a drill. Model Number: KLTJ100.
The big deal with this jig is how it gets you consistent mortises without a router: the auto-indexing step-down mechanism lowers the cutter tip 1/16 inch per pass. That keeps the cut controlled and repeatable, especially when you are making a batch of matching mortises for chair rails, table aprons, face frames, or cabinet parts.
Fit matters with loose tenons, and the MortiseMate is built around that. Micro adjustment screws let you fine-tune mortise width so you can set a tighter fit for maximum glue strength or open it up slightly when you need easier assembly.
Setup time is usually what kills mortise and tenon work. The integrated mini work surface is made for quick clamping with trigger-style clamps and is geared toward common shop tasks like panels and ninety-degree joints. Once it is set, it is easy to repeat the same placement and depth across multiple workpieces.
Depth control is handled at the cutter with a stop collar, and the cutter has laser-etched markings to speed up collar positioning for commonly used mortise depths, with room to adjust for custom tenon fitting. A carbide-tipped 6 mm mortising cutter is included, and 8 mm and 10 mm cutters are available separately to match common loose tenon sizes.
If you do furniture, cabinetry, built-ins, or general woodworking and you want Domino-style loose tenon joints without buying a dedicated joiner, this is the sweet spot. The Kreg Tool KLTJ100 MortiseMate Loose Tenon Jig is also a solid pick for small shops and mobile setups because it is designed to work with most corded and cordless drills and clamps down fast.
Controlled Cuts, Cleaner Mortises
The auto-indexing step-down action keeps you from trying to do too much in one pass. That is how you get more consistent mortise walls and a joint that glues up square.
- Auto-indexing mechanism lowers the cutter tip 1/16 in each pass
- Designed to cut mortises using a drill (no router required)
Dial In the Fit
Loose tenon work lives or dies on alignment and fit. This jig gives you the control to match mortise width to the tenon and keep parts registering where you need them.
- Micro adjustment screws customize mortise width for tight or easy-fit joinery
- Quick setup for panels and ninety-degree joints
Clamps Fast for Repeat Work
The integrated mini work surface is built for quick, secure clamping, which matters when you are moving from part to part and want consistent results without babysitting the setup.
- Fits workpieces from 1/2 in to 1-1/2 in thick
- Includes a carbide-tipped 6 mm mortising cutter and stop collar
What’s in the Box
- (1) MortiseMate Loose Tenon Jig
- (1) MortiseMate 6 mm Mortising Cutter with Stop Collar
- (1) Mini Work Surface
- (1) Dust Collection Adapter
- (3) Hex Wrenches (5/32 in, 1/8 in, 3/16 in)
- (1) Owner’s Manual
Key Specifications
| Weight (lbs) | 5.88 lbs |
|---|---|
| Workpiece Thickness Range | 1/2 in to 1-1/2 in |
| Step-Down Increment | 1/16 in per pass |
| Included Cutter | 6 mm carbide-tipped mortising cutter |
| Dust Collection | Dust collection adapter included |
| Made In | Canada |
| Warranty | 3-year limited |
| UPC | 647096813246 |
Compatibility
Power Tool Designed for use with most corded and cordless drills. Cutter Options Includes 6 mm mortising cutter; 8 mm and 10 mm cutters available separately.
Built For
Woodworking Cabinetry Furniture building Loose tenon joinery Panels Ninety-degree joints
Pro Tip
Set your stop collar using the laser-etched markings on the cutter, then let the jig do the work: take the full series of 1/16 in step-down passes instead of leaning on the drill to force depth.
Warranty & Support
3-year limited warranty.
Tool Nut’s Take
Tool Nut’s Take
Why the Kreg Tool KLTJ100 MortiseMate Loose Tenon Jig is the smart shortcut to mortise and tenon strength
It gives you repeatable loose tenon mortises with a drill, plus the adjustability you need to make joints fit right.
- Who it’s for: Woodworkers and cabinet builders who want strong hidden joints without a dedicated loose tenon joiner.
- Why it stands out: The 1/16 in auto step-down and micro-adjust mortise width are the features that keep results consistent instead of guessy.
- Worth knowing: The 6 mm cutter is included; if you build a lot with 8 mm or 10 mm loose tenons, plan on grabbing those cutters separately.
Common Questions
- What tool powers the jig? The MortiseMate is designed to cut mortises using most corded and cordless drills.
- What thickness material can it handle? It fits workpieces from 1/2 in to 1-1/2 in thick.
- How much does the cutter drop each pass? The auto-indexing step-down mechanism lowers the cutter tip 1/16 in each pass.
- Does it include a cutter? Yes, it includes a carbide-tipped 6 mm mortising cutter with a stop collar.
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