I acquired my Advanced Ropeclimbing Technology Positioner 2 from WesSpur Tree Equipment in 2009.
The Positioner 2 is a flipline adjuster. It is 88 mm. tall, 56 mm. wide, and 35 mm. thick, and weighs 154 g. It consists of an aircraft aluminum body with a spring-loaded friction clutch, a carabiner attachment arm, and a release lever.The body is a teardrop-shaped cylinder with a large central slot that nearly bisects the block. The circular diameter is 44.9 mm., and the teardrop extension on one end increases the length to 551.1 mm. The block is 31.1 mm. thick. The friction clutch and carabiner attachment arm pivot in the central slot. The friction clutch is is a chordal segment of a circular disk, cut away on the flat side and the top corner with a concave surface to match the rope diameter. It pivots on a pin that passes through from one side. A coil spring sits in a recess in the side of the clutch. The carabiner arm is 60 mm. long and 10 mm. thick along most of its length, widening at the base to fit the slot. There is a small oil hole in the base of the arm that passes down to the pivot. The carabiner eye is 15 mm. in diameter.
The release lever is 28 mm. long, tapered, and has a U-shaped cross section. It is pinned to the main block, and a set screw secures one of the pins.
A plastic cover on on one side of the body holds the various pivot pins in place. There is a double-faced velcro™ strip screwed to the other side.
The body of the Positioner 2 is marked with "Positioner," a book-with-an-"i" icon, the ART tree logo, "EN358," "EN567," "CE0123, and "0901 228" on the side, and with two stacked inverted "V"s on the circumference, pointing toward the carabiner attachment arm. The release lever is marked "ART." The carabiner attachment arm is marked "ART" on one side and "P 09" on the other. The clutch block is marked with two stacked inverted "V"s pointing toward the carabiner attachment arm, "Ø11-13" and "KB.POS." All of these markings are in dot-matrix form. The machine screws holding the cover on have "8.8" and "UM" marked on their heads.
The Positioner 2 looks very much like the Spiderjack, minus the wooden block. The Positioner 2 is very well made. Mine came with a 55-page manual, with instructions in five languages and additional notes in eleven more. Illustrations in the manual show how to use, disassemble, and repair the device (the positioner even came with two Allen wrenches). Overall, I think it is a very good manual, despite the author's inability to resist following the European practice of using incomprehensible icons as a substitute for effective communication.At least they provided a legend!