There is a nylon thread sold at sewing places and the like. You can use that to sew it up. The needle itself can be used to punch a hole. Be very careful, the needls are sharp. The store should also carry heavy duty needles for stitching leather as well. If its a tear in the leather, you can glue tubes into the lug end as a permanent fix if this is for Pams...This will both keep the leather from ripping any further as well as ensure you have a very strong end. Rubber cement sold at HD will work. Get a toothpick and smear glue inside of the strap lug end, let it set for 15 minutes or so and then place the tube inside. it should hold. Let the glue dry for a couple hours before any heavy use.