GB1053A Bronze Worm Gear 7/8"-14 Thread Click here for spec sheets:

Click here for spec sheets: SUCSTRS Spec Sheet

including plain

KWY/Setscrew/Other: W/ Double KWY Only

But why settle for a knock-off when you can have the original - from Boston Gear

Hand: Right Hand

GB1053A Bronze Worm Gear 7/8"-14 Thread Click here for spec sheets:When used with Boston Gear worms, Boston Gears worm gears provide effective power transmission in applications requiring high ratio speed reduction in a limited space using right angle (90), non intersecting shafts. They are also the smoothest, quietest form of gearing when properly applied. Boston Gear offers worm gears manufactured from a variety of materials, such as acetal, minlon, bronze, and cast iron to suit your applications requirements.