Description: This premium binder set is made of solid brass,can work better together with your tattoo machine. The front binder is a solid rod with a beehive-shaped contact screw,the rear binder has two clip cord holes for versatility (top and side-mount). Size: 6 x 4 x 1 cm/2.36 x 1.57 x 0.39 inch Material?Brass,Plastic Specification: Color: Coppery Package Includes: 1x Front Nut 1x Rear Nut 1x Binding Post 1x Plastic Screw