PROFESSIONAL REFERENCE CENTRE

Choose the right tool before you order

Practical guides, reference charts and selection advice to confirm dimensions, materials and applications.

11 technical guides
THREADING Tap drill size guide for machine tapping Find the recommended drill diameter before tapping and reduce the risk of damaged or weak threads. Open guide THREADING Metric tap diameter and pitch guide Quickly compare metric diameters, thread pitches and their corresponding tap-drill selections. Open guide EXTRACTION Left-hand tools for broken fasteners Learn when a left-hand drill can help and how to prepare for a cleaner fastener-removal job. Open guide EXTRACTION Screw extractor buying guide Choose the appropriate extractor style and size for the fastener, available access and break condition. Open guide DRILLING HSS vs cobalt drill bits for steel Compare heat resistance, tool life and the best applications for each drill-bit material. Open guide MAG DRILLING How to choose an annular cutter Confirm cutting depth, diameter, geometry and magnetic-drill compatibility before ordering. Open guide MAG DRILLING Magnetic drill parts buying guide Identify the components, accessories and replacement parts that fit your magnetic-drilling equipment. Open guide HOLE FINISHING Precision reamers buying guide Compare reamer styles for hole enlargement, alignment and accurate final sizing. Open guide TURNING Cutting tool bits for lathe work Select the tool material and geometry suited to common turning and profiling operations. Open guide FABRICATION Cutting tools for steel fabrication Explore the tool families used to drill, enlarge, countersink and prepare steel components. Open guide MASONRY Concrete and masonry tool-set guide Compare tool sets by work material, required diameter and jobsite application. Open guide

Why a Circular Saw Blade Burns the Cut

Burning indicates excessive friction, a dull or incorrect blade, poor feed or an unstable workpiece.

Why a Circular Saw Blade Burns the Cut

Burning indicates excessive friction, a dull or incorrect blade, poor feed or an unstable workpiece.

Why a Tile Drill Chips Porcelain

Chipping comes from impact, excessive pressure, poor cooling, vibration or a worn tile bit.

Why an SDS Bit Will Not Lock

Locking problems are often caused by contamination, worn grooves, the wrong shank or a damaged chuck.

Why a Masonry Bit Drills Slowly

Slow drilling can come from a worn tip, wrong hammer mode, excessive dust or a bit that does not suit the material.

Why a Left-Hand Drill Does Not Remove a Bolt

A left-hand drill may create the pilot without releasing the fastener when corrosion, preload or poor centering remains.

Best Tap and Die Sets for Repair Work

A repair-oriented tap and die set should cover common standards and include the sizes the shop actually uses.

Best Drill Bit Sets for Maintenance Departments

Maintenance teams benefit from broad size coverage, durable cases and quick replacement of common sizes.

What to Use When a Concrete Hole Hits Rebar

When reinforcement blocks a masonry hole, a compatible rebar cutter can help clear the obstruction.

Choosing a Hole Cutter for Electrical Boxes

Electrical box and conduit work depends on clean diameter, sheet thickness and arbor compatibility.

How to Choose a Porcelain Tile Drill Bit Size

Tile bit size follows the anchor, fitting or pipe penetration, not the tool brand.

How to Choose a Mag Drill Arbor Replacement

An arbor replacement must match the mag drill, cutter shank, pilot system and locking method.

Choosing a Long Aircraft Drill Bit

Long aircraft drills provide reach for deep or obstructed holes but need support and controlled feed.

Choosing an Annular Cutter for Two-Inch Steel Plate

Plate thickness determines usable depth of cut, while diameter and shank determine the hole and arbor fit.