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Boring Head Set, R8, Indexable with 4 Boring Bars Includes boring head, R8 shank, and 4-piece indexable boring bar set The boring head offsets up to 5/8", dial is graduated in 0.001" Minimum bore diameter is 7/16"; Maximum boring diameter is 5.906" Maximum boring depth is 2.5" The included indexable boring bars come with TCMT 21.5 C6 carbide inserts for steel and alloy $219.95 More products like this Electronic Digital Caliper, 6" Professional Grade Z-Limit brand guarantees professional quality Large, easy-to-read LCD display can be zeroed at any position Automatic shut-off after 5 minutes of non-use, last measuring position retained when shut off Hardened stainless steel body for long life, with fine adjustment thumb wheel Resolution is 0.0005" (0.01mm) and linear accuracy meets DIN 862 standard $64.95 More products like this Metal Transmission Gear Kit, Mini Lathe & 3MT Mini Mill Replaces both plastic transmission gears with metal Fits mini lathes and 3MT mini mills Small Gear: 12 Teeth / 20 Teeth, 12 mm Bore, 4 mm Keyway Large Gear: 21 Teeth / 29 Teeth, 30 mm Bore, 5 mm Keyway $67.95 More products like this