Schlage 35-003 Control Key Blank, "Do Not Duplicate", Embossed

A control key turns the control lug in a full-size interchangeable core and pulls that core out of the housing, so you can swap a core in seconds without removing the lockset from the door. It does not retract a latch or throw a bolt. This Schlage blank is the control side of that system, supplied uncut with a Do Not Duplicate warning embossed on the bow, and it has to be cut to your system's control bitting before it will turn anything.

No, and this is the most common mix-up on interchangeable core systems. A control key only removes and installs cores; it will not open a door. What your tenants or staff carry is an operating key, cut on an operating blank in the same keyway section. Order the control blank for your maintenance shop or locksmith, and a standard Schlage key blank in your section for day-to-day keys.

Match the section already stamped on your cores or on the control key you carry. The blank is offered in C000, C100, C120, C123, C124, C125, C135, C145 and C234. A blank from the wrong section physically will not enter the keyway, so read the control key itself rather than a change key off a tenant ring, since on a master keyed system the control key can be in a different section from the operating keys.

It ships as a blank, uncut. A locksmith or an in-house key shop cuts it to the control bitting for your keying system. Have your existing control key or your keying records in hand before you send it out, because the bitting is what makes it a control key rather than a piece of brass, and there is no way to derive it from the blank itself.

Six. The blank carries six cut positions, which matches the six-chamber cores standard on commercial Schlage interchangeable core systems. Your locksmith cuts only the depths your keying schedule calls for, so the blank works for the control bitting your site already runs, provided the keyway section is right.

It is a deterrent, not control. The wording is embossed into the bow and most reputable shops will turn the copy away, but the sections offered here, C000 through C234, are open Schlage Classic key sections rather than a patented restricted keyway, so nothing physically prevents a copy being cut. If you need duplication genuinely controlled, you need a restricted or patented keyway system with card-authorized cutting; a Do Not Duplicate blank raises the bar, it does not lock the gate.

No. Everest cylinders carry a check pin that only a blank with the matching undercut milling will lift, and a Classic C-family blank will not operate them even with correct cuts. The sections here, C000 through C234, are Classic sections for Classic interchangeable core systems. If your site was keyed under Everest, order an Everest control blank in your Everest section instead.

Not the right part for a home. This is a commercial item, and control keys exist only to remove interchangeable cores, which residential Schlage knobs and deadbolts do not have. For a house you want an ordinary Schlage key blank in your keyway cut to your existing key.

No. The blank is non-handed, and a key is determined by keyway section and bitting, not by which way the door swings. One control key section covers every opening on that system, left hand or right, provided the cores are all in the same section.

Because turnover and lost keys are handled by pulling the core, not by rekeying the lockset. With a control key, maintenance swaps a core at the door in under a minute and the unit is secure again the same day. Keeping blanks in your section means your locksmith cuts spares to the control bitting you already run, instead of you waiting on an order. A site running more than one keyway section needs a blank for each; the nine sections offered are C000, C100, C120, C123, C124, C125, C135, C145 and C234.