FT - HANDLE code K41C 40x10 mm SP pcs - straight Door hardware/Bathroom and toilet handles/Luxury hardware The fire key box is

The fire key box is made of steel sheet treated with powder firing paint - signal red

this handle/knob set can be adapted for thinner doors (minimum 40mm) by trimming the screws

It is also always  recommended for use on fire doors

For installation on doors outside this range

secure nut with locking spring square

FT - HANDLE code K41C 40x10 mm SP pcs - straight Door hardware/Bathroom and toilet handles/Luxury hardware The fire key box isThe door handle is made of high quality stainless steel, known as stainless steel, and is surface treated. The handle profile is 40x10 mm. The SPECIAL (SP) set contains fasteners for one sided mounting of one handle in wood, PVC, AL.