This is a custom handmade brass contact screw that is 1-1/4” overall length with 3/4” threads. This screw has a gear top head that has been rounded and polished to give it a sweet shine. The contact screw itself is brass and the thumb screw head is made of brass steel and copper parts. This is a one off screw made for USA American Traditional tattoo machines with US standard 8-32 threads. Please write with any questions and buy with confidence. Thanks, JCSTATTOOS.