Cobalt Jobber Twist Drill Bit
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COBALT Jobber Twist Drill Bits (503 series)

  • Industrial grade drill bit made for professionals. Precision grounded from solid construction
  • Perfect for drilling in hard metal such as stainless steel, wood, and plastic
  • Heavy duty, heat-treated High Speed Steel material for extended bit life and the best cutting performance
  • COBALT steel finish adds an extra protective layer to make the bit drill faster and last longer
  • 135° Split Point tip eliminates “wobbling/walking” by self starting and self centering the drill bit to not require center punch holes
  • SPIRAL flutes allows for efficient heat, debris, and chip removal
  • Round straight shank on diameters 11/64″ and under. 3 Flats shank on diameters 3/16″ and up

 

WARNING: This product contains chemicals known to the State of California to cause cancer and birth defects or other reproductive harm. www.P65Warnings.ca.gov

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Industrial grade cobalt jobber twist drill bit is perfect for heavy duty drilling in wood, plastic, hard metal, and composites. 135° split point eliminates a pilot hole and prevents walking/wobbling. COBALT steel and spiral flutes create fast cuts and makes the drill bit last longer

Cutting Diameter (IN.) Overall Length (IN.) PART NUMBER UPC NUMBER 722170-
1/16″ 1-7/8″ 503.0464 50301
5/64″ 2″ 503.0564 50302
3/32″ 2-1/4″ 503.0664 50303
7/64″ 2-5/8″ 503.0764 50304
1/8″ 2-3/4″ 503.0864 50305
9/64″ 2-7/8″ 503.0964 50306
5/32″ 3-1/8″ 503.1064 50307
11/64″ 3-1/4″ 503.1164 50308
3/16″ 3-1/2″ 503.1264 50309
13/64″ 3-5/8″ 503.1364 50310
7/32″ 3-3/4″ 503.1464 50311
15/64″ 3-7/8″ 503.1564 50312
1/4″ 4″ 503.1664 50313
17/64″ 4-1/8″ 503.1764 50314
9/32″ 4-1/4″ 503.1864 50315
19/64″ 4-3/8″ 503.1964 50316
5/16″ 4-1/2″ 503.2064 50317
21/64″ 4-5/8″ 503.2164 50318
11/32″ 4-3/4″ 503.2264 50319
23/64″ 4-7/8″ 503.2364 50320
3/8″ 5″ 503.2464 50321
25/64″ 5-1/8″ 503.2564 50322
13/32″ 5-1/4″ 503.2664 50323
27/64″ 5-3/8″ 503.2764 50324
7/16″ 5-1/2″ 503.2864 50325
29/64″ 5-5/8″ 503.2964 50326
15/32″ 5-3/4″ 503.3064 50327
31/64″ 5-7/8″ 503.3164 50328
1/2″ 6″ 503.3264 50329
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