Aska Extra Spare Shaft 5/16x18 Thread Joint 13mm Hard Brown Tip. Canadian Hard Rock Maple, Black Collar with Ring Aska 5/16x18 13mm Extra Spare Shaft Black Collar With Ring 13mm Hard Glued On Brown Tip , 5/16x18 Joint, ABS Ferrule Flat Faced Joint, Will Fit to Most Cue Sticks with 5/16x18 Joint