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Best Two Piece Threading Dies

Greenfield Threading 423055 Die System Complete Assembly, 1" - 8 #5, Carbon Steel, Uncoated (Bright) Coating, Right Cut, 2-Piece
Die construction: two-piece die set complete assembly. Die style: two-piece die system.
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HHIP 1011-3312 12 Piece 1/8-1" NPT Taper Pipe Tap and Hex Die Set
HHIP 12 Piece 1/8-1" NPT Taper Pipe Tap and Hex Die set includes one of each of 1/8-27, 1/4-18, 3/8-18, 1/2-14, 3/4-14 and 1-11-1/2 NPT tap and dies Thread ground high speed steel.
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HHIP 1011-0111 110 Piece #4-3/4" and M6-18 Carbon Steel Tap and Die Set
HHIP 110 Piece #4-3/4" and M6-18 Carbon steel tap and die set includes 1 taper tap, 1 bottoming tap and 1 die in each of these sizes 4-40, 6-32, 8-32, 10-24, 12-24, 10-32, 1/4-20, 1/4-24, 1/4-28, 1/4-40, 5/16-18, 5/16-24, 3/8-16, 3/8-24, 7/16-14, 7/16-20, 1/2-13, 1/2-20, 9/16-12, 9/16-18, 5/8-11, 5/8-18, 3/4-10, 3/4-16, 1/8-27NPT, 1/4-18NPT, M6 x 1.0, M8 x 1.25, M10 x 1.0, M10 x 1.5, M11 x 1.5, M12 x 1.25, M12 x 1.75, M14 x 1.25 and M18 x 1.5 die. T-handle tap wrench.
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Best Hex Threading Dies

Century Drill and Tool 97617 Hexagon Metric Die, 12.0 x 1.25
Size: 12.0 x 1.25. Enter your model number to make sure this fits.
Reviews
"You do not need the die holder to make it work, just a cresent wrench or vise grip pliers are fine."
"I get the die to where it seems to be straight but hand pressure doesn't come close to moving it, hit it with more lube and grip it with the pliers and start to turn it. The amount of force needed was significant enough to make me slightly worried so I grabbed my safety glasses, (hard metals can be brittle and I didn't want to risk anything if it shattered under pressure) and kept at it. It stayed pretty straight and finally hit the existing, functional section of threading and I was able to use hand pressure again."
"Slowly turn until it snugs up, then back and forth until it smooths out."
"After buying junk from sears that didn't work then buying dies at auto parts stores with no success I was about to spend $90 for one single die from Snap On until I found this."
"So I saved money for not buying extra tools to get this dye to work."
"I just threaded 12 inches of mild tool steel and it cut quite well."
"Works well for chasing threads."
"It looks like a thread chasing die, not a thread making die."
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Best Round Threading Dies

RIDGID 91142 Model 535A Threading Machine, Automatic Pipe Threading Machine with 1.75-Gallon (6.6 liter) Oil Reservoir and Large Chip Tray for Longer Continuous Run, Machine Only - No Die Head or Dies
The high-speed dies can rapidly thread pipes from 1/8 inch to 2 inches (3 mm to 50 mm), bolts from 1/4 inch to 1 inch (6 mm to 25 mm), or larger pipes ranging from 2-1/4 inches to 4 inches (62 mm to 100 mm) when used with a 141 geared threader. Every tool that bears the RIDGID brand is engineered to the same high standards of quality, strength and endurance, as was that first heavy-duty pipe wrench more than 80 years ago. Every tool that bears the Ridgid brand is engineered to the same high standards of quality, strength and endurance as was that first heavy-duty pipe wrench more than 80 years ago. 2 Universal high speed dies are included and sized to cut pipes ranging from 1/2 inch to 3/4 inch (12 mm to 18 mm) and 1 inch to 2 inches (25 mm to 50 mm).
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