Mastercool 3667 A/C System Pressure Gauge Air Drills A simple push of the

A simple push of the patented push button adjustment maintains jaw size setting and gives you the correct size opening every time

7 out of 5 stars 80 ratings 4

3/16" to 1

3/4"dr 2 7/8"deep imp

15pc 3/4" dr

Mastercool 3667 A/C System Pressure Gauge Air Drills A simple push of theThe Mastercool 3667 is a precision A C system pressure gauge designed for use in automotive and HVAC refrigerant service applications. It features a silicone anti flutter mechanism that stabilizes needle movement for accurate, easy to read pressure measurements. The dual scale dial displays both PSI and In Hg vacuum readings, while an integrated temperature scale in degrees Fahrenheit supports refrigerant identification. Compatible with R12 and R134a