I acquired my Climb Axe Max from Climb Max in 2003.
The Climb Axe Max is forged from aluminum alloy and then soft anodized. Mine is 56 mm. long, 47 mm. wide, 100 mm. high, and weighs 51 g. The slots are 34 mm. long and 16 mm. wide. The top of the Omega oval carabiner that I use for comparing belay tubes sits 7 mm. below the ends of the slots. The Climb Axe Max has a flexible, plastic-covered, cable keeper.
One side of my Climb Axe Max is marked "Climb Axe," while the other has two rigging icons, one showing the high friction arrangement with a "+" in a circle underneath, and one one showing the low friction arrangement with a "-" in a circle underneath.
The Climb Axe Max has several distinctive features, but overall, performs like most devices of this type. The rope slots are hour-glass shaped, but this does not appear to affect their performance. The Climb Axe Max is slightly asymmetrical, giving two distinct riggings. These are screened on the side of the device. One would expect a difference in friction for the two riggings, with more friction if the braking line runs over the shorter end; however, I do not notice much difference. The plastic-coated cable keeper is moderately flexible, but stiff enough that it tends to stay out from under the rope.
The Climb Axe Max is essentially identical to the Kong Chuy, Mad Rock Max Air, Ocùn Tuber, and Simond Tubik.