SPI 30-425-3 Small Hole Gage Set, 1/8" - 1/2"

Features:

• Full radius measuring faces with flat bottom, ideal for measuring shallow holes, slots, grooves.
• Size adjustment by knurled knob.
• Final size is obtained by measuring over the contact points with a micrometer.
• Gaging surface is fully hardened.
• Satin chrome finish.
• Extra long for gaging deep holes and slots