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Core Bits

MK Black
Supreme Grade for Concrete & Asphalt
MK Orange
Premium Grade for Concrete & Asphalt
MK Yellow
Standard Grade for Concrete & Asphalt

MK Black is a supreme grade core bit engineered for exceptional footage and fast/aggressive drilling characteristics. Excellent performance in applications associated with moderate to high steel reinforcement.

MK Orange is a premium grade bit designed for wet drilling applications that include light to moderate steel reinforcement. The high diamond concentration ensures excellent footage and cutting speed.

MK Yellow is a standard grade core bit, and is an excellent choice for all types of general wet drilling. The MK Yellow delivers fast drilling and good footage.

Additional diameters and lengths available on request.

Diameter Nut MK Black
1/2" (13mm) 5/8"-11 156373
5/8" (16mm) 5/8"-11 157176
3/4" (19mm) 5/8"-11 156374
7/8" (22mm) 5/8"-11 156375
1" (25mm) 5/8"-11 156376
1-1/8" (29mm) 5/8"-11  157177 
1-1/4" (32mm) 5/8"-11 156377
1-3/8" (35mm) 5/8"-11 156534
1-1/2" (38mm) 5/8"-11 156378
1-5/8" (39mm) 1-1/4"-7 157178
1-3/4" (44mm) 1-1/4"-7 156379
2" (51mm) 1-1/4"-7 156380
2-1/4" (57mm) 1-1/4"-7 156381
2-1/2" (64mm) 1-1/4"-7 156382
2-3/4" (70mm) 1-1/4"-7 156383
3" (76mm) 1-1/4"-7 156384
3-1/4" (83mm) 1-1/4"-7 156385
3-1/2" (89mm) 1-1/4"-7 156386
4" (102mm) 1-1/4"-7 156387
4-1/4" (108mm) 1-1/4"-7 156388
4-1/2" (114mm) 1-1/4"-7 156389
5" (127mm) 1-1/4"-7 156390
5-1/2" (140mm) 1-1/4"-7 157628
6" (152mm) 1-1/4"-7 156391
6-1/4" (159mm) 1-1/4"-7 156392
6-1/2" (165mm) 1-1/4"-7 156393
7" (178mm) 1-1/4"-7 156394
8" (203mm) 1-1/4"-7 156396
9" (229mm) 1-1/4"-7 156397
10" (254mm) 1-1/4"-7 156398
12" (305mm) 1-1/4"-7 156399
14" (356mm) 1-1/4"-7 156400
16" (406mm) 1-1/4"-7 170051
Segment Height 7.5 mm
Drilling Depth 14"
Additional diameters and lengths available on request.
Diameter Nut MK Orange
1" (25mm) 5/8"-11 156348
1-1/8" (29mm) 5/8"-11 204011
1-1/4" (32mm) 5/8"-11 156349
1-3/8" (35mm) 5/8"-11 171317
1-1/2" (38mm) 5/8"-11 156350
1-5/8" (39mm) 1-1/4"-7 171318
1-3/4" (44mm) 1-1/4"-7 156351
2" (51mm) 1-1/4"-7 156352
2-1/4" (57mm) 1-1/4"-7 156353
2-1/2" (64mm) 1-1/4"-7 156354
2-3/4" (70mm) 1-1/4"-7 156355
3" (76mm) 1-1/4"-7 156356
3-1/4" (83mm) 1-1/4"-7 156357
3-1/2" (89mm) 1-1/4"-7 156358
4" (102mm) 1-1/4"-7 156359
4-1/4" (108mm) 1-1/4"-7 156360
4-1/2" (114mm) 1-1/4"-7 156361
5" (127mm) 1-1/4"-7 156362
5-1/2" (140mm) 1-1/4"-7 157627
6" (152mm) 1-1/4"-7 156363
6-1/4" (159mm) 1-1/4"-7 156364
6-1/2" (165mm) 1-1/4"-7 156365
7" (178mm) 1-1/4"-7 156366
8" (203mm) 1-1/4"-7 156368
9" (229mm) 1-1/4"-7 156369
10" (254mm) 1-1/4"-7 156370
12" (305mm) 1-1/4"-7 156371
14" (356mm) 1-1/4"-7 156372
16" (406mm) 1-1/4"-7 170052
Segment Height 7.5 mm
Drilling Depth 14"
Additional diameters and lengths available on request.
Diameter Nut MK Yellow
1" (25mm) 5/8"-11 156320
1-1/8" (29mm) 5/8"-11 104011
1-1/4" (32mm) 5/8"-11 156321
1-3/8" (35mm) 5/8"-11 156965
1-1/2" (38mm) 5/8"-11 156322
1-5/8" (39mm) 1-1/4"-7 171310
1-3/4" (44mm) 1-1/4"-7 156323
2" (51mm) 1-1/4"-7 156324
2-1/4" (57mm) 1-1/4"-7 156325
2-1/2" (64mm) 1-1/4"-7 156326
2-3/4" (70mm) 1-1/4"-7 156327
3" (76mm) 1-1/4"-7 156328
3-1/4" (83mm) 1-1/4"-7 156329
3-1/2" (89mm) 1-1/4"-7 156330
4" (102mm) 1-1/4"-7 156331
4-1/4" (108mm) 1-1/4"-7 156332
4-1/2" (114mm) 1-1/4"-7 156333
5" (127mm) 1-1/4"-7 156334
5-1/2" (140mm) 1-1/4"-7 171311
6" (152mm) 1-1/4"-7 156335
6-1/4" (159mm) 1-1/4"-7 156336
6-1/2" (165mm) 1-1/4"-7 156337
7" (178mm) 1-1/4"-7 156338
8" (203mm) 1-1/4"-7 156340
9" (229mm) 1-1/4"-7 156341
10" (254mm) 1-1/4"-7 156342
12" (305mm) 1-1/4"-7 156343
14" (356mm) 1-1/4"-7 156344
Segment Height 7.5 mm
Drilling Depth 14"
Additional diameters and lengths available on request.

Laser welded segments provide strength and durability.

Wet core bit drawing (PDF format)