BD Safety Lok

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TweetAnybody ever seen the BD Safety Lok syringes? They're different. I guess the purpose of the outer sleeve that locks is so you can't pull the plunger out??? The only other thing that I could think of is after you inject, you slide the outer sleeve up to lock it so the needle can't be accessed. I don't know??? They are some heavy duty jokers.

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Tweetya the safety lock is to make the neddle safe after its used, they are also more expensive than the luer lock and you can change the neddle size.