Need help with a Masterlock No.575

[FarmerFreak]

Maybe he's using an American kit to key up both Americans and Masters. There is no reason that it wouldn't work.

Squelchtone is right though, Master doesn't use serrated pins. At least in the last ten years I have yet to see one.

[le.nutzman]

Here's what I've learned about masterlock padlocks. They almost always have serated pins. Top and bottoms can be like this. I have found that picking these locks upside down holding the tension wrench with your pinky finger of the left hand and picking down. It feels like holding the tension this way turns the plug better than leaning the bottom. If that makes sense.

Wow.......after being gone for so long and I come back and here we are STILL discussing Masterlock using security pins...ROFLMAO!!

I have, to date, picked open over 1k American 5200 locks and just about as many Masterlocks of various flavors, my favorite being the Masterlock DG series. And I can tell you for certain, Masterlock DOESN'T use security pins, ESPECIALLY serrated pins.

[pjzstones]

Maybe he's using an American kit to key up both Americans and Masters. There is no reason that it wouldn't work.

Squelchtone is right though, Master doesn't use serrated pins. At least in the last ten years I have yet to see one.

i've seen serrated pins in a few #140's

[Captainwtf]

The #575 definately has one spool pin, I have taken the lock apart and have pictures of the process somewhere on my home PC, and as far as i know the #576 does not. The best way to open the #575 is to use an extremely light amount of tension, about the weight of your finger alone. Hope that helps.

[stratmando]

At the risk of being Necroed, I don't want to start a new post, as it applies to the above posts.
Master Lock does use The UP(Universal Pin) Padlock that has serations, or places to shear the pin when making makeing the lock fit to an existing key.
This was one I couldn't pick, had to grind rivits to see what was going on and found the end piece froze/coroded solid, wouldn't budge, I may have picked it a hundered times, but since it wouldn't turn, I'll never know.

[RBrande1]

I gutted a Master #410 Lockout Padlock after turning the plug too far and dumping the pins...5 spools and one serrated...

That's the only serrated pin I've ever seen in a Master.

[FFVison]

I never popped a lock with serrateds myself, but I know that there are some Masters that have spool pins, or so I read. They act similar to what I would expect with a lock with spool pins. I have a 575 somewhere, I think, and I think it's one of the ones that I had difficulty opening (if I ever did). I only picked up lockpicking again for the first time in quite some time. I remember that there used to be a thread on this forum that dealt with Master Locks and which of them had security pins. Look around and you might find it. If anyone knows the thread, feel free to post it. I know I have a 140 and was incredibly shocked to find out that they have spool pins. I was shocked because when I first stuck the pick in (probably to the third pin in) the plug moved. I let up a little tension and re-applied the tension and it just turned and popped open. I guess some of the locks are like that. I'm at my girlfriend's house right now, but I kinda want to go home to my big bag of locks and try my hand at opening them again.

[FFVison]

Eh, sorry... was hoping that I could find an edit button so I didn't have 2 posts in a row. Anyway, I found that thread I mentioned. It is actually a sticky in the "Locks" forum. It can be found here:
http://www.lockpicking101.com/viewtopic.php?f=9&t=23712
Indeed it does list both the 575 and 576 as having security pins. Hope this was helpful