These are billett CNC machined aluminium 'Spiked' Bar Ends. They are designed to fit 7/8" aluminium bars with a typical 14mm bore, such as Renthals ( steel bars with an 18mm 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. Please make sure you buy the right ones!