HomeRAIL BOTTOM W/INSERT ATTACHES TO THE BOTTOM OF A BASE TO BE ABLE TO MOUNT THE BASE ON A RAIL. THIS WILL WORK ON 7/8" AND 1" RAILS. YOU WILL USE THE PLASTIC INSERT FOR 7/8" RAILS000-1002 RAIL BOTTOM W/INSERTSKU: 000-1002$16.00PriceQuantityAdd to Cart