Door Lock Mortiser Kit with Lock Fitting Jig and Tungsten Steel Cutters (18mm, 22mm, 25mm)
Product description
The essentials
If you’re planning to fit or update a mortise lock in a wooden door, a dedicated mortising jig can save you from a lot of guesswork. This Door Lock Mortiser Kit is built around a stable jig frame with adjustable guides and vertical cutting support, aimed at keeping your grooves more consistent as you work.
On paper, the appeal is pretty clear: the kit uses an anti-slip mat, a removable sliding bearing to reduce friction, and height/depth stops on the guides to help you avoid overrunning the cutting area. It’s the sort of tooling set that makes sense if you want repeatable results rather than relying purely on measuring and hand alignment.
That said, it’s not a “grab it and it’s perfect” solution. If your existing cut-outs are already messy, or you’re working on very odd door conditions, any jig can’t magically fix poor door prep. You still need to take your measurements seriously and set the stops carefully.
What it’s for (and where it fits)
This kit is designed for opening mortise lock holes in wooden doors, including new lock hole installs and modifications such as eccentric lock hole changes, and updating door hardware like password or fingerprint lock installations (on wooden doors).
It’s also positioned as a tool you can use to modify door locks, which is useful for DIYers who don’t want to replace the door or bring in a specialist for every change.
It suits a practical scenario: you’ve got a wooden door, you’re swapping locks, and you want the new mortise to land in the right place with cleaner vertical grooves. You set up the jig, align it with the guide system, then cut the groove to depth and length using the provided cutters.
Key takeaways for setup and accuracy
The kit’s design centres on stability and vertical guidance. Two slides are adjustable via two 7-shaped universal screws, which is intended to help keep grooves vertical. The long, widened jig base (with an anti-slip mat) also supports steadier positioning, especially if you’re working at your bench or on a door that isn’t perfectly immobilised.
A removable sliding bearing between the positioning ring and bearing seat is included to reduce friction, which can help accuracy when you’re moving the cutter through the work.
There’s also a fixed screw on the bottom mat meant to lock the guide rail in place, to prevent shaking.
One thing to bear in mind: the kit’s guidance helps with alignment and depth control, but you’ll still need to mark and measure properly. The stops reduce the risk of cutting too far, yet bad initial layout will still show up in the final mortise.
What stands out about the cutters
You get three M10 tungsten steel alloy cutter heads sized for 18mm, 22mm, and 25mm. Tungsten steel cutters are described as having high hardness and sharpness, and being less prone to wear. In plain terms, that’s a sensible choice for mortising work where the cutting edge needs to stay effective across repeated passes.
However, without information on the exact lock sizes you’re targeting, it’s worth double-checking which cutter size matches the groove requirements for your specific mortise lock. Picking the wrong cutter size is one of the easiest ways to make the job harder than it needs to be.
The essentials you get in the box
The package includes a door lock slotting tool (mortiser jig), three M10 cutters (18 mm, 22 mm, 25 mm), two spanners, a ruler, a wood chisel, and a plastic suitcase for storage.
For DIY, having the basic hand tools and a chisel included is convenient—especially if you need to clean up edges or finish the mortise work after cutting.
Who it’s for (and who should skip it)
It’s a strong fit if you’re doing lock installations or lock modifications on wooden doors and you want a jig-based approach for more consistent vertical grooves. It also makes sense if you’ll use the kit more than once—because mortar lock changes (swaps, upgrades, updates to password/fingerprint style hardware) are the kind of jobs where the jig earns its keep.
It may not be the best choice if you only plan to do a single small job and you don’t want to invest in tooling and setup time. It can also feel like overkill if your main goal is quick drilling with minimal fuss, or if you’re working on non-wood door materials.
Tech summary
Product specs
- Door thickness range (wood): 25–90mm
- Maximum opening groove depth: 140mm
- Maximum opening groove length: 240mm
- Jig size: 45 × 34cm (lengthened/widened)
- Gross weight: 11lb (5kg)
Final verdict
Buying verdict
This Door Lock Mortiser Kit is worth considering if you’re fitting or modifying mortise locks in wooden doors and you like the idea of a stable jig with vertical guidance, height/depth stops, and cutter options sized for 18mm, 22mm and 25mm grooves.
You may want to skip it if you only need one-off help, you’re not comfortable with careful measuring and setup, or you’re expecting it to compensate for poor door prep—jigs reduce the friction and alignment headaches, but they don’t replace good layout.
If you prioritise repeatable results for lock upgrades (rather than quick-and-dirty drilling), this kit’s approach looks practical. Just make sure the cutter size and your lock’s groove requirements line up before you start cutting.
Mini FAQ
Questions people usually ask
Can this kit open new lock holes as well as modify existing ones? Yes—according to the product description, it’s used to open new lock holes and also modify door locks, including eccentric lock hole changes.
What type of doors is it meant for? It’s stated for wooden doors within the 25–90mm thickness range.
Which cutter sizes are included? It includes three M10 tungsten steel cutters sized 18mm, 22mm and 25mm.
Will the jig prevent cutting too deep? The guide system includes height and depth stops intended to avoid cutting beyond the correct area, though careful setup is still essential.