6 PCS, 3/8″, Black and Gold Twist Drill Bits 3/8 in

6 PCS, 3/8″, Black and Gold Twist Drill Bits. Cobalt drill bits: Classic M2 High Speed Steel construction with Black and Gold finish for proven capability and durability. Hardness: M2 Twist drill bits’ Rock wall Hardness Level HRC 62-63.

11623 Letter Gauge Drill Bit, Size W

U.S. AISI M2 Molybdenum High Speed Steel. Letter Gauge W Drill Bit – 0.386″ dia. 5-1/8″ len. Rockwell Hardness: Point C65 Shank C34. Century Drill & Tool. 135° Split Point. Fully Ground from billet blanks.

11618 Letter Gauge Drill Bit, Size R

Letter Gauge R Drill Bit – 0.339″ dia. 4-3/4″ len. Rockwell Hardness: Point C65 Shank C34. Century Drill & Tool. 135° Split Point. Fully Ground from billet blanks.

11612 Letter Gauge Drill Bit, Size L

Part Number 11612. Letter Gauge L Drill Bit – 0.29″ dia. 4-1/4″ len. Rockwell Hardness: Point C65 Shank C34. Century Drill & Tool. Shank Type Straight. 135° Split Point. Unit Count 1.0 Count.

11606 Letter Gauge Drill Bit, Size F

Model 11606. Part Number 11606. Shank Type Straight. Included Components HSS Drill Bit. Rockwell Hardness: Point C65 Shank C34. Letter Gauge F Drill Bit – 0.257″ dia. 4-1/8″ len. Unit Count 1 Count.

U.N.C. 18 Pc H.S.S. Tap and Drill Set,

18 Pc Tap and Drill Set. 18 Pcs/Set Tap & Drill Set, UNC. Size of Drills: #36, #29, #25, #21, #7, F, 5/16″, U, & 27/64″. Ground from solid high speed steel. HSS Fully Ground.