Specification Brand : RedLine Tools BulletPoint1 : Made in USA BulletPoint2 : Centering Countersink BulletPoint3 : used to produce a shallow conical or center hole BulletPoint4 : Quality built counter bore attaches to flats on shank with 2 hex screws for a secure fit and can be adjusted for controlled pilot hole depth; Drill, countersink and counterbore in 1 step; the countersink cutter providing superior speed and clean finish BulletPoint5 : Universal 1/4 inch hex shank prevents slipping in standard chucks and is compatible with all 1/4 inch quick-change chucks, including impact drills; this product is Professionally manufactured in China at FTG USA specifications; Hex Key (Allen Wrench) included CuttingAngleString : 60.0 degrees FinishType : Uncoated ItemName : RedLine Tools - #4 Center Drill Cobalt Combined Drill Countersink, Uncoated Finish, 2 Flute, 60° Point Angle, 2.1250 OAL - RC27204 ItemPackageQuantity : 1 ItemTypeKeyword : countersink-bits Manufacturer : RedLine Tools Material : Cobalt Material1 : Carbon Steel Material2 : Alloy Steel NumberOfFlutes : 2 NumberOfItems : 1 PartNumber : RC27204 ProductDescription : FTG Maximum Torque -Tapered Bits secured with Pin- 5 Piece Value Set Adjustable Wood Countersink feature the best tapered drill bits HSS M2 (Grade 6542) , by far the most popular High Speed Steel, M2 has superior properties, including high toughness, wear resistance, and good cutting retention. This bundle contains also 3 Piece Same Size #8 (11/64") replacement tapered HSS drill bits only. Countersink #4 Bit Diameter 7/64" (2,8mm) , counterbore size and plug size 3/8" -Countersink #6 Bit Diameter 9/64" (3,6mm) , counterbore size and plug size 3/8" -Countersink #8 Bit Diameter 11/64" (4,4mm) , counterbore size and plug size 3/8" - Countersink #10 Bit Diameter 3/16" (4.8mm), counterbore size and plug size 3/8" -Countersink #12 Bit Diameter 7/32" (5,6mm) , counterbore and plug size 1/2". All of them have the shank size 1/4". Drill, countersink and counterbore in 1 step. Logo brand is laser printed on each countersink shank making it easier to differentiate this quality brand from others. Super sharp, very durable, easy to use, and built to perform well in both hard and soft woods. Top quality material #45 Carbon Steel adjustable four-cutter counter bore, chamfer angle 82 degree, attachment that cuts fast and clears chips quickly for fast, smooth countersinking applications. The counterbore feature attaches flats on shank with 2 hex screws for a secure fit and can be adjusted for controlled pilot hole depth providing a clean finish for more polished final products. Hex Key (Allen Wrench) included. This product is Professionally manufactured in China at FTG USA specifications. Packaging set design protected by US Copyright Office ProductSiteLaunchDate : 2021-08-04T12:04:29.253Z Size : #4 Center Drill SurfaceRecommendation : Wood UnitCount : 1 UnspscCode : 20121600