ST-2605 TRIGGER GUN by SUTTNER (4539)A commercial cleaner's dream, comfort technology designed trigger system actually helps the operator keep the trigger open. Fatigue is reduced, allowing longer work periods. If you have extreme abuse applications, the ST 2605 is up for the challenge with it's handle constructed of impact resistant plastic. Suttner exclusive relax action trigger and comfort grip reduces trigger force up to 20% and holding force up to 60%. Easiest opening and holding