I think they are talking about "dubs" as in rims for your car. "dubs" is slang for 20's as in 20 inch rims or also slang for street drug prices like let me get a "dub" or even slang in every day talk like can I borrow a dub from you?
Usually refers to a needle. It could also (though not as commonly) refer to a nearly empty corner baggie. Point is also used as slang for "tenth of a gram" as it refers to the deimal point when saying "point one grams."