SPI Small Hole Gage: Flat Bottom Type, 0.300 – 0.400″ – 30-428-7

• 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

See all SPI Small Hole Gages: Flat Bottom Type