DRILLCO DRL429A232 - 1-1/2 Spiral Flute Hex Nut Construction ReamerBrand Drillco Product SKU 429A232 Category Reamers Size Fractional Material High Speed Steel Finish Coating Black Oxide Pack Quantity 1 Size 1. 1 2 Overall Length 7. 7 8 Flute Length 5 Description Construction or Car Reamers are especially adapted for heavy duty reaming as encountered in the fabrication of structural steel assemblies. They are tapered at the point to facilitate entering of holes which are out of alignment.