Specification AgeRangeDescription : adult Brand : Star USA BulletPoint : Includes 5 pieces BulletPoint1 : High Speed Steel BulletPoint2 : Overall Length: 6" BulletPoint3 : 3. The split tip design helps reduce walking. The high-speed steel conical mesh design for plastic, wood, and metal is durable to breakage. The black and gold coatings help rust and wear. BulletPoint4 : 4. The cutting blade adopts high-quality double-sided cutting spikes, which can grab wood and carve it off, creating beautiful holes and reducing breakage. Accurately drill holes in wood, fiberglass, plastic, and PVC. BulletPoint5 : 5. Accurate: A 60 degree angle center drill is very useful for drilling precise center holes, 60 degree countersunk holes, or starting holes for larger drill bits in metal processing. BulletPoint6 : Packed in plastic box for safe storage and easy carrying. Color : Style1 100pcs ExternallyAssignedProductIdentifier : 8161311623301 ItemName : Sizes #1 - 30 Reamer Blanks Size: #21 (.1590"), OAL: 3-1/4" (5 Pcs.) ItemPackageDimensions_Height : 10 centimeters ItemPackageDimensions_Length : 20 centimeters ItemPackageDimensions_Width : 15 centimeters ItemPackageQuantity : 1 ItemTypeKeyword : drill-blanks Manufacturer : Star USA Material : High Speed Steel ModelName : 佳汇 ModelNumber : 佳汇 NumberOfBoxes : 1 NumberOfItems : 1 NumberOfPieces : 1 PartNumber : 2315908583 ProductDescription : Precision Ground - Specifically made as blanks for precision drills. Republic blanks have been used for many purposes over the years. Republic H.S.S. blanks have been used as shafts, arbors, guide rods, rollers, gages, alignment pins, punches, knockout pins, as well as for stock in the manufacturing of specialty tools and instruments. With tight dimensional tolerances, Republic drill blanks are perfect for any project needing precise finished ground stock. Drill Blank Tolerances: Up to .5000" (-.0002" or .005mm), from .5001" to .6250" (-.0003 or -.008mm), from .6251" to 1.0000" (-.0005" or -.013mm). ProductSiteLaunchDate : 2011-10-07T16:36:11.962Z Size : One Size UnitCount : 1 UnspscCode : 20121600