17/64" x 4-1/8" Cobalt HSS-J/L Drill Bit Extensions Made of heat treated alloy

Made of heat treated alloy steel for durability

Seals: Buna N model No

Packaged in patented slide rail for easier positioning of sockets - internal slide rail eliminates interference / ball bearing retention

and 1/2" Drive - E18 Bit Sockets

Knurled ends provide grip surface

17/64" x 4-1/8" Cobalt HSS-J/L Drill Bit Extensions Made of heat treated alloy17 64" x 4 1 8" Cobalt HSS J L Drill Bit Features and Benefits: Standard jobber length 135 degree split point reduces feed pressure for easier penetration without work hardening Shorter cutting lips reduce torque when drilling in high tensile strength materials Heavy duty web construction for strength and durability