Description

Key Features

Fast, Repeatable Mortises

The integrated router bit depth guide helps you dial in hinge depth once and keep it consistent from door to door.

Fits Common Hinge Sizes

Adjusts for hinges from 2-1/2 inches to 5 inches, with corner radius options so you are not stuck with one hardware style.

Kreg KRTHJ100 Door Hinge Routing Jig Control

GripMaxx clamp surface holds tight without chewing up the door, and onboard bit storage keeps the included bit right on the jig.

Overview

The Kreg KRTHJ100 Door Hinge Routing Jig (Model Number KRTHJ100) is a door hinge routing jig built to help you rout clean, consistent hinge mortises and door latches without a bunch of measuring and rechecking. This is a router accessory designed for routing door hinge mortises and latches.

The big win with this jig is repeatability. The built-in router bit depth guide lets you set the depth you need for the hinge leaf and keep it there, so your hinges sit flush and your reveals stay consistent. That matters when you are hanging multiple doors and you do not want to “tune” every hinge with a chisel after routing.

Fit-up is simple: the one-piece adjustable guide stop is made to cover the hinge sizes you run into most, from 2-1/2 inches up to 5 inches. Corner radius can be adjusted as well, including support for 1/4 inch and 5/8 inch corner radius hinges. If you are working with square-corner hinges, you can still use the jig to rout most of the pocket, then square the corners with a chisel.

The clamp surface is Kreg GripMaxx, so it is designed to bite without leaving clamp marks on finished doors. That is a real advantage when you are doing prefinished slabs or painted doors where you cannot afford to dent the surface during setup.

Beyond hinges, the jig includes door latch templates sized for 1-3/8 inch and 1-3/4 inch doors, so you can rout latch plates accurately for the two most common residential door thicknesses. It also includes a 1/2 inch straight router bit with a 1/4 inch shank, plus onboard storage so the bit is not rolling around in the bottom of your toolbox.

If you are a trim carpenter, remodeler, or a DIYer doing more than one door, this jig is the difference between “good enough” and clean, professional-looking hardware fit. It is especially useful when you need consistent results across a whole house worth of doors.

Clean Hinge Mortises Without Guesswork

Clamp it on, set your router depth, and rout. The jig guides the cut so your hinge leaf sits where it should, and your hinge barrels line up clean from top to bottom.

• Adjustable for 2-1/2 inch to 5 inch door hinges
• Integrated router bit depth guide for consistent mortise depth

Fits the Hardware You Actually Use

This jig is made for real-world hinge sizes and corner styles, so you are not buying a one-trick template that only works on one hinge.

• Corner radius support for 1/4 inch and 5/8 inch hinges
• Works with square-corner hinges (chisel required for the corners)

Depth Control You Can Trust

Hinge depth is where most installs go sideways. Too shallow and the door binds, too deep and the hinge leaf sinks. The built-in depth reference helps you set it right and keep it there.

• Designed for consistent, professional mortise depth
• Keeps setup simple when moving from door to door

What’s in the Box

• (1) Door Hinge Routing Jig
• (1) 1/2 inch Straight Router Bit, 1/4 inch shank
• (2) Door Latch Templates (for 1-3/8 inch and 1-3/4 inch doors)
• (1) Owner’s Manual

Key Specifications

Tool Type	Door hinge routing jig (router accessory)
Hinge Length Range	2-1/2 inches to 5 inches
Corner Radius Options	1/4 inch radius, 5/8 inch radius, and square corner (chisel required)
Door Thickness Templates	1-3/8 inch and 1-3/4 inch
Included Router Bit	1/2 inch straight router bit
Bit Shank Size	1/4 inch
Clamp Surface	GripMaxx non-marring clamp surface
Storage	Onboard router bit storage

Compatibility

Router Bit Compatibility

Compatible with the Kreg 1/2 inch Flush Trim Bit with a 1/4 inch shank.

Built For

Carpentry Remodeling Door hanging Hinge mortising Door latch routing DIY / Hobbyist

Pro Tip

Set the depth using the jig’s depth guide on a scrap first, then rout one hinge mortise and test-fit the hinge leaf before you run the rest of the door. It takes two minutes and saves you from chasing depth across every hinge.

Tool Nut’s Take

Tool Nut’s Take

Kreg KRTHJ100 Door Hinge Routing Jig: The “Do It Once” Door Jig

If you want hinge mortises and latch plates that look like you do doors for a living, this jig gets you there without a pile of templates.

• Who it’s for: Anyone hanging multiple doors, plus trim carpenters and remodelers who need consistent hinge fit fast.
• Why it stands out: Adjustable hinge sizing with corner radius options, plus the built-in depth guide and non-marring GripMaxx clamp surface.
• Worth knowing: Square-corner hinges still need a chisel to finish the corners after routing.

Common Questions

• What hinge sizes does it fit? It adjusts to fit door hinges from 2-1/2 inches to 5 inches.
• Can it handle different hinge corner styles? Yes, it works with 1/4 inch and 5/8 inch corner radius hinges, and it can be used for square-corner hinges (chisel required for the corners).
• Does it help with door latches too? Yes, it includes door latch templates for 1-3/8 inch and 1-3/4 inch doors.