Billiard Cue Extension for ADAM MUSASHI Bolt - Brand New This product is CNC (Computer Numerical Control) machined and features an aluminum alloy joint screw. Unlike the screws on other extensions, this is not fixed with plastic or glue, ensuring a more secure and stable attachment. Weight Bolt Bumper Length: 15cm Weight: 29g Can be connected, tighten securely with a hex wrench.