A heavy duty all-steel construction tacker offering an alternative tool designed for use only with STCR 5019 type staples.  Rear loading

Markwell or Bostitch brand staples are available, as follows:

STCR 5019-1/4”
STCR 5019-3/8” galvanized or stainless
STCR 5019-1/2"
STCR 5019- 9/16".