Short answer: A key that shears off inside a deadbolt or door handle feels like a disaster, but for a working locksmith it is a routine, roughly ten-to-thirty-minute job. Here is why keys break, what to avoid before help arrives, and the exact way a pro gets the broken piece out without wrecking the lock.
A key that shears off inside a deadbolt or door handle feels like a disaster, but for a working locksmith it is a routine, roughly ten-to-thirty-minute job. Here is why keys break, what to avoid before help arrives, and the exact way a pro gets the broken piece out without wrecking the lock.
Keys almost never break because you did something wrong in the moment. They break because the metal was already fatigued. Brass keys and thin aftermarket copies wear a little every time they are turned, and hairline cracks form near the shoulder where the key meets the lock face. Cold mornings, a stiff or under-lubricated cylinder, and forcing a key that is 'almost' turning are what finish the job. The single most important thing to do once it snaps is stop touching it. Do not push a second key in to shove the piece deeper, do not try superglue (it bonds the broken half to the pins and turns a cheap fix into a full cylinder replacement), and do not spray oily lubricants that attract grit. If part of the key is protruding, resist yanking it with pliers unless it slides out cleanly, because twisting usually snaps off any remaining lip and buries it.
A pro starts by reading the situation: is the break flush, recessed, or sticking out, and is the plug turned or straight. If the cylinder is rotated even slightly, the broken half is wedged against the pins and has to be turned back to the neutral 'key' position first using a tension tool. Then the actual extraction is done with thin, barbed steel extractor tools that slide along the key channel, hook into the cut teeth or the flat of the blade, and draw it straight out. Sometimes two are used in tandem to keep the piece from rotating. A light, dry lubricant such as graphite or a Teflon-based product is applied first so the metal glides rather than digs in. When the break is truly flush and the key is aluminum-soft (common on some car keys), a locksmith may instead disassemble the cylinder from the door to push the fragment out the back. Brute force and drilling are last resorts, not opening moves.
Getting the fragment out is only half the visit. If a key broke, the odds are good the rest of that key set is worn to the same point, so a fresh cut key from the original code or a good remaining copy prevents a repeat next week. A locksmith will also check the cylinder for damage: pins can get nicked, and a lock that felt gritty before the break often needs cleaning and proper lubrication rather than replacement. If the lock is decades old, sticky even when clean, or a bargain-grade unit, replacing or rekeying it to a higher-grade cylinder is worth discussing. As a rough guide, a straightforward broken-key extraction with a service call in this area often lands somewhere in the range of about seventy-five to a hundred fifty dollars depending on the lock type, whether the plug was jammed, and time of day, but always ask for a firm number before work begins.
Keys almost never break because you did something wrong in the moment. They break because the metal was already fatigued. Brass keys and thin aftermarket copies wear a little every time they are turned, and hairline cracks form near the shoulder where the key meets the lock face. Cold mornings, a stiff or under-lubricated cylinder, and forcing a key that is 'almost' turning are what finish the job. The single most important thing to do once it snaps is stop touching it. Do not push a second key in to shove the piece deeper, do not try superglue (it bonds the broken half to the pins and turns a cheap fix into a full cylinder replacement), and do not spray oily lubricants that attract grit. If part of the key is protruding, resist yanking it with pliers unless it slides out cleanly, because twisting usually snaps off any remaining lip and buries it.
A pro starts by reading the situation: is the break flush, recessed, or sticking out, and is the plug turned or straight. If the cylinder is rotated even slightly, the broken half is wedged against the pins and has to be turned back to the neutral 'key' position first using a tension tool. Then the actual extraction is done with thin, barbed steel extractor tools that slide along the key channel, hook into the cut teeth or the flat of the blade, and draw it straight out. Sometimes two are used in tandem to keep the piece from rotating. A light, dry lubricant such as graphite or a Teflon-based product is applied first so the metal glides rather than digs in. When the break is truly flush and the key is aluminum-soft (common on some car keys), a locksmith may instead disassemble the cylinder from the door to push the fragment out the back. Brute force and drilling are last resorts, not opening moves.
Getting the fragment out is only half the visit. If a key broke, the odds are good the rest of that key set is worn to the same point, so a fresh cut key from the original code or a good remaining copy prevents a repeat next week. A locksmith will also check the cylinder for damage: pins can get nicked, and a lock that felt gritty before the break often needs cleaning and proper lubrication rather than replacement. If the lock is decades old, sticky even when clean, or a bargain-grade unit, replacing or rekeying it to a higher-grade cylinder is worth discussing. As a rough guide, a straightforward broken-key extraction with a service call in this area often lands somewhere in the range of about seventy-five to a hundred fifty dollars depending on the lock type, whether the plug was jammed, and time of day, but always ask for a firm number before work begins.
Call (650) 419-3433 and describe the situation, your exact location, and what you need. Timing is confirmed on that call rather than promised in advance.
Call for help: (650) 419-3433 — a straight answer and an honest estimate before any work begins.