4" Hinge Fire Check Block For Essential Hinge Jig

Fire check block for the use for fitting fire doors when an additional hinge is required 100mm from the top hinge. 

Colour-coded blue for 4-inch 

1 x fire check block for 4-inch hinges. 

Please note:

You will need a guide bush that is 4mm larger than your cutter, not made for router bits with a bearing. So if using a 12mm, then 16mm would be required. If using a 12.7mm you would need a 16.7mm. 

* Orders placed from the 7th of November 2023 will already receive these Thumbscrews with your Essential Hinge Jig.