MS4043-00-130 Cylinder Guard

Function

The standard mortise cylinder is made of brass.  It is literally a soft spot in narrow stile door security.  Using special pliers, a pipe wrench or other leverage device, a burglar can tear the cylinder out of the door, leaving an opening for which he can operate the deadlock.  Against this problem, the MS4043 cylinder guard offers a three-way defense:  First, the outer shield ring is fully beveled to offer poor purchase for prying for twisting.  Second, the ring is hardened steel so that the combination of shape and hardness make it virtually impossible to grip, even with sharpened tools.  Third, in the event that a prying tool, such as a cold chisel, can be driven into the stile behind the shield ring, the would-be burglar is obliged to pull a heavy steel plate through a round hole in the 1/8” metal door stile.  This degree of leverage is far beyond that available with most hand tools.

Security Ring

Made of hardened steel.  Free-swinging when properly installed.

Retainer Ring

Hardened steel, plated for corrosion resistance.  Permits security ring to swivel.

Security Ring: Zinc-plated hardened steel. Free swivelling.

Retainer Plate: Steel with corrosion resistant plating.

Options

MS4043 fits standard 1/8” stile wall.  For 1/4” thick stile wall, specify MS4043-01.  See catalog for cylinder information.

Standard Package

Individually packaged with spacers for flush fitting in thin stile walls.  Cylinders available at extra cost.  Shipping weight: 1/8 lb.