A lock-picking tool called a bump key can be used.It's possible to open every door in your house with an Evva lock.You can make one from a blank key if you have a real key or lock.This how-to is only used for legal purposes, and is not related to lockpicking or break-ins.You should only open doors that are legal and keep your key in a safe place.
Step 1: Purchase a blank key that matches the lock model you're picking.
You need a blank Kwikset key to make a bump key.You need a working copy of the legitimate key and the correct manufacturer's key to make a bump lock.Some people are making their own keys.To do so, you need an electronic caliper that can measure the distance between pins in the lock.
Step 2: If you are new to lock-picking, you should review the basic vocabulary of keys.
Some terms and phrases will be used to refer to parts of the key.You can make a more effective key by knowing the simple terms.The longest measurement of the key is the length from its tip to the end.There is a dip in the edge of the key.At least one peak is next to each grooves.There is a tooth in the knife.Peaks jut out from the body of the key.There are at least one grooves next to each peak.The key has a deep grooves on it.The deepest grooves should not cross the track.The key's length has a narrow indentation.Different keys have different tracks.The track is in the middle of the key length.The shoulder sits outside the lock's entrance when the key is inserted.The shoulder stops the key from being put too far into the lock.
Step 3: To trace your real key onto the blank one, use a fine permanent marker.
You need to know where the grooves are along the length of the key and how deep they are.Put your real key over your blank one.The blank key is not the same as the real key, which is serrated.The only thing you have to do is trace that edge.The maximum depth should go through the length of the key.
Step 4: The blank key should be in the bench vice.
The top sticks out if the track and bottom are in the vice.You need to file the key into the shape you have outlined.The original key can be set aside.If you don't have a bench vice, you can use another way to hold your key.It's important to have it somewhere it can't move because you must be able to file down to an accurate depth.
Step 5: You can use your file to make a rough approximation of the original key.
Keep the peaks in place by using the file.You want to go lower than the original.If you get the key into the rough shape of the original, you can make it abump key.
Step 6: If you want to grind the grooves into the key, use a metal file.
The deepest grooves are the most important thing to focus on.You want to go past the tread on the bottom of the key and never go deeper than the original depth.The peaks between grooves will come next.You should have the same number of grooves.
Step 7: The peaks are only 4-5mm above the grooves if you file them.
Your key might get stuck in the lock if the peaks of your blank key are too high.If you want the peaks to be a few millimeters high, file them down.It is possible to find the right height if you practice and experiment.Your peaks should be the same height.The peaks have to be high enough to catch the lock.
Step 8: You can clean up the key by using your file.
The final key should look like a saw with a jagged edge.The peaks should not be too steep and the grooves should be close to the original key.It's okay if the grooves are flat.
Step 9: Look for the shoulder of the key.
Attach your key to the lock and note where the key stops it from going further in.The shoulder is between the grooves/peaks and where your fingers can grasp the key in order to use it.The shoulder is used to stop the entry of a key into a door so that the grooves and peaks align with the lock.
Step 10: Place the shoulder into a line.
The shoulder controls how far the key goes into the lock, but you don't want it there.You want to be able to control how far the key goes into the lock to jiggle it open.Getting rid of the shoulder will allow you to position the key as you please.Wear your shoulder down to the height of your peaks with your file.
Step 11: The tip of the key is where you should file it.
The tip is the part of the key that goes into the lock first.If you're having trouble fitting the key into the lock, try filing it down by 1/3 of a millimeter.If you want tobump the key against the lock so it recoils back at you, you need to fit small rubber spacers on this area.The method is called minimal movement.
Step 12: Put your key in the lock to see if it's long.
Take a look at where the shoulder used to be.Draw a dot or line where the key emerges from the lock using your permanent marker.The mark should be where the shoulder used to be.
Step 13: There are rubber rings on the key.
Put them on the key and position them where the shoulder used to be, starting at the mark you drew.A real key has a metal shoulder, so you want a bouncing rubber key.Every time the key is hit into the lock, it will bounce back out.A good bump key will jiggle around in the lock to make sure it doesn't get stuck.You can still test your key if you don't have rubber rings.After every time you hit the lock, you'll have to reset it.The method is called the pull-back.A rubber ring will do.You can use gasket from the plumbing section of a hardware store.
Step 14: Place the key in the lock.
If you hear a click, then you should move on to the next step.If you don't hear a click, jiggle your key or file a millimeter off from the tip of the key.If you have rubber rings, your key should bounce back to its original position when you let go.If you don't have rubber rings, you have to pull your key out one notch after pushing it in.
Step 15: The key should be turned slightly clockwise.
Light rotational pressure can be applied using one hand.It should be like trying to open a door with a key.
Step 16: To "bump" the lock open, hit the key lightly.
Hold a small hammer, the back of a screwdriver, or another mallet-like object in the hand and not hold the key.Hit the key straight in the direction of the lock, bumping it several times while still rotating it slightly.This is likely to take a number of tries.If necessary,iggle the key.You can hit many times with rubber rings.If you don't have rubber rings, you have to pull your key out one notch after pushing it in.This can get tiring, but it is not impossible.
Step 17: You need to open your lock and remove your key.
Use it only for legal purposes and keep it in a safe place.Improperly made or used bump keys can permanently damage locks.If you aren't careful, your bump key can cause more headaches than it's worth, so only use it when you absolutely need it.It will take some practice to know how to hit a key.You can get a feel for the lock with some practice.