OSB621.3/4″ Hand Ventilator Setter

Osborne 3/4″ Hand Ventilator Setter

Instructions for setting 3/4” Ventilators:

1.- Punch 9/16 hole in material (Use Osborne No. 149 -9/16” punch or on vinyl use No. 149 7/16 punch).

2.- Lay ventilator neck up on base, place material over ventilator, now slip ventilator ring on bow side up. A few even taps with a rawhide mallet will set ventilators.