The Hammer is Profile's only Drop style bar. It's made of 6061-T4 aluminum alloy tubing. The tubing has a 23.7mm outer diameter, and a 1.7mm wall thickness at the ends. Between the tubing ends, the wall thickness may vary based on bend and bulges. A groove is pressed into the front face of the top section of the bar. This is the trough for recessing under the handlebar wrap the brake and shifter cables when an aero styled brake/shift lever is used. The Hammer is made in two drops. The smaller, shallow drop version measures 139mm center to center, the larger "steep" drop measures 175mm from the center of the top to the center of the lower drop. Each Hammer drop bar comes with two halves of 1" diameter aluminum tubing. These sections are 64mm long and made to be inserted at the back side of the tight radius inside the lower drop. When these pieces are covered they smooth the tight area and make a broader area for palm support. The Hammer bar is anodized a Gun Metal Blue color, and comes in two widths in each of the drops, 40 cm, 42cm, in the shallow model and 42 cm or 44 cm in the steep drop model. The center most 3 1/2" is bulged, leaving the needed 26.0mm standard outer diameter for Road stem other than the Cinelli with the 26.4mm I.D. The 42 cm Hammer shallow drop bar weighs 307.5 grams, the included bare aluminum tubing sections add an additional 20.5 grams (328 grams total). The 42 cm steep drop version of the Hammer weighs 375 grams, the included Black vinyl covered tubing sections add an additional 37 grams (412.5 grams total).