Master Cobalt BI-Metal Hole Saws

Master Cobalt BI-Metal Hole Saws

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Master Cobalt® Bi-Metal Hole Saws

This premium line of professional quality hole saws features an M3 high-speed steel cutting edge, electron beam welded to a tough steel backer. Caps stand up to abuse and punishment, yet are lighter and easier to use than those of competitors. Positive rake tooth design provides better chip clearance as teeth cut into wood, plastic or any machinable metal. The 1-1/2" cutting depth cuts easily through 2x4's. A separate arbor is required

  • Backer, cutting edge and cap work together to provide faster, longer-lasting cutting action
  • Bi-metal design bonds M3 cutting edge to fatigue resistant backer
  • Positive rake teeth clear chips better for longer life and easier cutting
  • Teeth stay sharper and make smoother cuts
Diameter *

1/Box Product Number

1/Card Product Number
Inches 2 5/8 MM    
AV09-AV244 use any of the following arbors M24, M24K, M34, M44, or M44K
9/16 14 AV09 AVC09
5/8 16 AV10 AVC10
  16 AV105 AVC105
11/16 17 AV11 AVC11
3/4 19 AV12 AVC12
  20 AV125 AVC125
13/16 21 AV13 AVC13
7/8 22 AV14 AVC14
15/16 24 AV15 AVC15
  25 AV155 AVC155
1 25 AV16 AVC16
1/16 27 AV17 AVC17
1 1/8 29 AV18 AVC18
  30 AV185 AVC185
1 3/16 30 AV19 AVC19
1 1/4 32 AV204 AVC204
1 3/8 35 AV224 AVC224
1 1/2 38 AV244 AVC244
AV20-AV385 use any of the following arbors M35PS, M45, M45P, M46PS, M55P or M44K
1 1/4 32 AV20 AVC20
  32 AV205 AVC205
1 5/16 33 AV21 AVC21
1 3/8 35 AV22 AVC22
  35 AV225 AVC225
1 7/16 37 AV23 AVC23
1 1/2 38 AV24 AVC24
1 9/16 40 AV25 AVC25
  40 AV255 AVC255
1 5/8 41 AV26 AVC26
1 11/16 43 AV27 AVC27
1 3/4 44 AV28 AVC28
  45 AV285 AVC285
1 3/16 46 AV29 AVC29
1 7/8 48 AV30 AVC30
  50 AV315 AVC315
AV20-AV38 use any of the following arbors M35PS, M45, M45P, M46PS, M55P,or M44K
2 51 AV32 AVC32
2 1/16 52 AV33 AVC33
2 1/8 54 AV34 AVC34
  55 AV345 AVC345
2 1/4 57 AV36 AVC36
2 5/16 59 AV37 AVC37
2 3/8 60 AV38 AVC38
  62 AV385 AVC385
AV40-AV96 use any of the following arbors M45P, M46PS, M55P,or M44K
2 1/2 64 AV40 AVC40
2 9/16 65 AV41 AVC41
5 5/8 67 AV42 AVC42
  68 AV425 AVC425
  68.5 AV435 AVC435
2 3/4 70 AV44 AVC44
2 7/8 73 AV46 AVC46
  75 AV475 AVC475
3 76 AV48 AVC48
3 1/8 79 AV50 AVC50
3 1/4 83 AV52 AVC52
3 3/8 86 AV54 AVC54
3 1/2 89 AV56 AVC56
3 5/8 92 AV58 AVC58
3 3/4 95 AV60 AVC60
3 7/8 98 AV62 AVC62
  100 AV63 AVC63
4 102 AV64 AVC64
4 1/8 105 AV66 AVC66
4 1/4 108 AV68 AVC68
4 3/8 111 AV70 AVC70
4 1/2 114 AV72 AVC72
4 3/4 121 AV76 AVC76
5 127 AV80 AVC80
5 1/2 140 AV88 AVC88
5 3/4 146 AV92 AVC92
6 152 AV96 AVC96
* Metric sizes shown in red are exact millimeter sizes. Metric sizes in black are approximate metric equivalents of exact inch sizes.
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