The Proselect is far from being portable – lacking collapsibility and being made of steel makes it quite heavy. The crate has four locking detachable casters that allow the crate to be easily moved around the floor to different areas of the house. The Proselect crate does excel at being an indestructible crate at a reasonable price compared to the collapsible & lightweight competitors.
Complimenting the robust aluminum build is a door that is made of solid steel bars that have been welded to a high standard. This package of strength is sure to keep your escape artist pooch secure. The doors are connected to the body by a full-length striker plate and piano hinge. For extra security, each door features a flush-mounted slap latch allowing for a solid close.
The wire is thinner than my old crate, which is also made of the black metal, but it is still sturdy. I used to have the really heavy silver steel crates but they are ugly and stronger than necessary. I guess if you have a dog you think might get out, you should use zip-ties all around and bungee the door when the dog is inside. The ... full review
Addendum added January 28, 2013: My vet had never noticed these carriers because I had never put one up on the exam table until my last vet visit. She looked at it with interest and totally concurred with my opinion of having a small, but open carrier for my two (panicky) cats. She has seen more than a few overheated pets in too enclosed carriers. Since I live far from the vet I always carry spare towels for the bottoms of the carriers and she found that the "stable floor covering'* I use was an additional comfort feature for my pets long trip to their appointments. (I just ordered the larger size of this carrier for my "Phat Kat" and will donate her previous carrier to our local animal shelter.)