With the most versatile offering of cams on the planet, Ultralight Power Cams, TCUs, Offsets, Fat Cams and Supercams, why add a single-stem cam to the line? The reason is that there is an infinite number of variables in the climbing environment: hard rock, soft rock, parallel cracks, flared cracks, etc . . . Each individual cam style excels at a certain set of variables. The biggest advantages of the Metolius Master Cams single-stem unit are: they will fit into certain placements better than the U-shaped body and the flexible, single cable reduces leverage to minimize walking in certain placements. Metolius set out to make the finest single-stem unit they possibly could and the Master Cam is the result. They made Slider Nuts over 25 years ago, so they are no strangers to flexible, single-stem designs. The Master Cam combines a nice, flexy cable with an ultra-narrow head for hard aid or free climbing. Since Metolius invented the CNC milled cam-stop, they naturally applied them to Master Cams. They also joined the silky-smooth trigger assembly with an ergonomic thumb piece to provide precise control over placement and retraction. The longer body affords additional reach when top-stepping or stretching for that hard-to-get placement. The Range Finder system also provides critical placement feedback for those who need it. Master Cams are hand-built right in the Bend, Oregon shop. Each one is thoroughly inspected and every unit is tested to 5 kN. Master Cams are CE and UIAA certified. Features: A flexible, single stem unit with an ultra-narrow head width for hard aid or free climbing Molded thumb piece 13 mm Monster slings webbing (36% Dyneema/64% nylon) Ranger Finder tells you at a glance if you've chosen the right size cam for the placement. Greater Holding Power! Optimized cam angle for more outward force Machined cam stops Color-coded sewn slings and tubing CNC machined for much greater precision than stamped or extruded cams 7075 T-6 aluminum CE/UIAA certified Sizes #00-#6 Specs: 00 gray: 0.34" - 0.47", 5 kN, 2.2 oz 0 purple: 0.39" - 0.59", 5 kN, 2.3 oz 1 blue: 0.49" - 0.71", 8 kN, 2.4 oz 2 yellow: 0.62" - 0.89", 10 kN, 2.5 oz 3 orange: 0.74" - 1.04", 10 kN, 2.9 oz 4 red: 0.93" - 1.32", 10 kN, 3.2 oz 5 black: 1.09" - 1.56, 10 kN, 3.5 oz 6 green: 1.28" - 1.89", 10 kN, 3.8 oz