IRWIN 3041006 6 Pc. Set SPEEDBOR MAX (1/2 5/8

The Fastest Speedbor everTri-Flute design for faster chip ejectionCutting spurs have 3 cutting edges for added durabilityFull screw tip allows bit to self feedGrooved hex shank prevents slipping in drill chuck or bit extensionFits all standard 1/4" quick change chucksIncludes an IRWIN Pro Set Case made of durable molded ABS resin, so it can hold up to anything the jobsite throws at it. Case includes a full-length metal hinge pin for maximum durability and long life, and bit identification is simple with easy-to-read size markings.SpecificationsItem #DescriptionShank LengthSet Type30410033-pc set includes: 5/8", 3/4" and 1"6"Clam30410066-pc set includes: 1/2", 5/8", 3/4", 7/8", 1" and 1-1/4"6"Hard Case180102210-pc set includes: 7/16", 1/2", 9/16", 5/8", 3/4", 7/8", 1", 1-1/8", 1-1/4" and 1-3/8"6"Soft Case18772396-pc set includes: 1/2" ,5/8", 3/4", 7/8", 1" and 1-1/8"4"Clam18772405-pc set includes: 1/2", 5/8", 3/4", 7/8" and 1"4"Clam18772413-pc set includes: 5/8", 3/4" and 1"4"Clam18772426-pc set includes: 1/2", 5/8", 7/8", 1", 6" OAL Quick Change Extension4"Clam