I drill my holes for the stiching and use mason ( braided) line.(not the twisted) this line is rated at 150 lbs. The sticth I use is two needles one on each end of the line passing through the same hole and pulled tight enough that you need a glove to keep the line from cutting into your hand. I've got holsters over 20 years old that look like they been through a war (wet ,dried out ,drug through brush, thorns you name it, and no thread rot or breaks yet!--Willy