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10 Best hole enlarging drill bits of 2026
Explore top picks
1
AOKLITAOKLIT 3 PCS Diamond Beveling Chamfer Bits Set, Tile Cone Grinder Bit with 5/8-11 Thread Adapter, 1" Diamond Drill Bits for Hole Enlarging Trimming Grinding in Tile, Marble, Glass, Granite,Ceramic
9.7Exceptional
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2
Nevada ToolNevada Tool 1" Drill Bit Bridge Reamer/Construction Reamer, 1/2" Shank, Conduit Reamer, HSS Taper Bridge Reamer Drill Bit Tool, Car Reamer for Steel Metal Wood Alloy to Align or Enlarge Existing Holes
9.6Exceptional
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3
ZELCANZELCAN 10 Sizes Titanium Step Drill Bit, 1/4 to 1-3/8 Inches High Speed Steel Drill Cone Bits for Sheet Metal Hole Drilling Cutting, HSS Multi Size Hole Stepped Up Unibit for DIY Lovers Electrician
9.5Excellent
Our Rating
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4
XNManaWorkHex Shank Rotary Steel File Drill Bits Set for Milling Filing Shaping Grinding Engraving Enlarging Holes 1/4 Inch 6.35mm Shank 5 Pieces
9.2Excellent
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5
NEIKONEIKO 10181A Step Drill Bit Set, 3 Piece, Spiral Grooved for Faster Drilling, Step Bits for Stainless Steel, Metal, Wood, Plastic, Unibit Cone Drill Bits with 31 Step Sizes Total
8.9Very Good
Our Rating
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6
PLATINUMEDGEPLATINUMEDGE Step Drill Bits Set, 5 Pcs High Speed Steel Step Drill Bit for Sheet Metal, 50 Step Sizes Hole Drilling, Double Flute Cutting Blades, Nitride Black Coating and Polished, Storage Box
8.7Very Good
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7
HORNEDIM10 Thread Diamond Core Stepped Pagoda Drill Bit,Diamond Beveling Chamfer Multi-Layer Conical Hole Opener for Metal,Granite Drill,Countersink Drill Bit for Enlarging, Shaping (1Piece)
8.6Very Good
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8
NEIKONEIKO 10194A Titanium Step Drill Bit, High-Speed Alloy-Steel Bit, Hole Expander for Wood and Metal, 10 Step Sizes from 1/4 Inch to 1 3/8 Inches
Key specs-
Hole Sizes:1/4 to 1 3/8
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Cutting Angle:135-degree
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Material:4241 high-speed alloy steel
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Coating:Titanium nitride
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Flute Type:2-fluted spiral
8.4Good
Our Rating
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9
TolleSonneDiamond Beveling Chamfer Bits Diamond Countersink Drill Bit for Existing Holes Enlarging Shaping Trimming in Tile Marble Glass Granite Ceramic 1-7/8"(48mm) Dia with 5/8-11" Thread Adapter
8.2Good
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10
TolleSonneDiamond Beveling Chamfer Bits Diamond Countersink Drill Bit for Existing Holes Enlarging Shaping Trimming in Tile Marble Glass Granite Ceramic 1-7/8"(48mm) Dia with 5/8-11" Thread Adapter
8.0Good
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