A handy complementary tools when working with heavy leather, which is what i mainly make stuff out of,
stitching fork lays out the stitching pattern
https://www.ebay.com/itm/Leathercraf...m4cgZ15qw7HCMw
a skiver for leather
https://www.ebay.com/itm/Durable-Lea...hrUBu8ND_ckL-A