Great stainless steel thumb screw for the Dart Zone Pro Blaster that includes an O-Ring. This is a replacement for the bolt sled thumbscrews for the Dart Zone Pro 1 and 1.1

This also works great in the Dart Zone Pro MK4 Springer for quick access to your springs. You'll need two for the MK4.

FEATURES:
• High quality stainless screw

SPECS:
• Material: stainless steel
• M4 thread size