These are billett CNC machined aluminium 'Spiked' Bar Ends. They are designed to fit 7/8" steel bars with a typical 18mm bore ( Ally bars with a 14mm bore are a separate product). They are fixed in position with two 'O'rings which grip the inside of the bar. This system is very safe and secure, and leaves a beautiful looking bar end without any blemishes, such as bloody great fixing bolts! Supplied in a fine machined finish. Price is per pair.