Hi mate, this is some info on the brake. only wanted a light brake as i will not use it that much

the racers' choice, the Shimano 105 5700 Brake Calliper comes in a compact and lightweight design for high performance. The compact Super SLR Dual-Pivot design provides superior brake performance and light action. Enhanced brake proportions give a quicker linear response and increased power. Low profile outer cable stop position improves cable routing for reduced friction. Convex washers on the brake shoes offer toe-in adjustment and easy alignment, and the cartridge brake shoes are easy to replace. The lightweight aluminium construction has an anodised finish to preserve the good looks.