TOOGOO(R) 1 Pair Bicycle Cycling Bike V Brake Holder Pads Shoes Blocks Red With Black Made of rubber and stainless steel, durable and non-slip. Stick to a screw, easy installation. Rubber with grooves provides intense frictional force. Specially designed for V brake. Reduce squeal when braking, won't hurt the rim. Can endure consistent jolts and bumps. Compatibility with Sram, Shimano and all major V-brake systems.