Why is there no drawing showing where the 6 inches is measured? ditto for all sizes? how can the smallest dimesion be several inches?

A 6-inch clamp will hold an object in its jaws a maximum of 6-inches in size; a 12-inch clamp will hold something twice as big—12-inches, ansd so on. This style of clamp is the greatest: one-hand is all that's needed to tighten or loosen the clamp, unlike a c-clamp which requires at least two hands to work and takes a long time and effort to clamp something.

What does clamp capacity mean? It's listed as 6" to 36" for this clamp. Is 36" or 3 ft. the range of travel?

A six-inch clamp of any type means you can put a six-inch object between its jaws (actual maximum opening would be 6-1/6" to 6-1/4 "); 36" clamp would fit 36" between its jaws.

According to there website as of 2008 their tools are made in China.

What is the throat depth on these clamps?

From throat to lower (inner) part of swivel jaws 1.25"From throat to upper (outer) part of swivel jaws 3-3/16"From throat to middle (center) part of swivel jaws 2.5"

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IRWINQUICK-GRIPOne-Handed Bar Clamp, Medium-Duty, 12", 1964718

Product ID: 3315135

Details

Brand
IRWIN
Color
Blue
Global Trade Identification Number
Item Weight
1.5 Pounds
Item dimensions L x W x H
19.67 x 9.17 x
Material
Resin

💪300 lbs clamping force

🔄Quick-Change button for clamp-to-spreader

🛠️I-beam bar reduces flexing

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Description

🔧 Clamp it. Spread it. Own the project like a pro.

POWERFUL ONE HANDED GRIP - Delivers 300 lbs of sustained clamping force with effortless one-handed operation.
DURABLE I BEAM BAR DESIGN - Engineered to resist bending and flexing under extreme pressure for reliable performance.
PRECISION LOCKING SWIVEL JAW - Ensures even pressure distribution while protecting your workpiece with non-marring pads.
INSTANT QUICK RELEASE TRIGGER - Release clamping pressure instantly with a smooth, one-handed trigger for maximum efficiency.
VERSATILE QUICK CHANGE FUNCTION - Easily converts from clamp to spreader with a simple button press—adapt on the fly.

The IRWIN QUICK-GRIP One-Handed Bar Clamp (12") combines 300 lbs of clamping force with a patented locking swivel jaw and an I-beam bar design to minimize flexing. Featuring a Quick-Change button for easy clamp-to-spreader conversion and a one-handed Quick-Release trigger, it offers professional-grade versatility and durability for medium-duty projects.

Specifications

ASIN	B001DK7SJM
Best Sellers Rank	#16,502 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #16 in Bar Clamps
Brand Name	IRWIN
Color	Blue
Customer Reviews	4.7 4.7 out of 5 stars (2,835)
Global Trade Identification Number	00038548103709
Included Components	IRWIN QUICK-GRIP Bar Clamp, One-Handed, Medium-Duty, 12-Inch (1964718)
Item Dimensions	19.67 x 9.17 x 4.92 inches
Item Type Name	IRWIN QUICK-GRIP Bar Clamp, One-Handed, Medium-Duty, 12-Inch (1964718)
Item Weight	1.5 Pounds
Manufacturer	IRWIN
Manufacturer Part Number	1964718
Manufacturer Warranty Description	No
Material Type	Resin
Model Number	2005992
Style Name	12 Inch
Tensile Strength	300 Pounds
UPC	038548103709 809386496731 640026827108 803982926265 787721788928 041114556731 115970698406 801200943544 100058641948 038548512228 168141354199 807031777006 809187144442 182682285644 100177460499 151903413784 787721839309 012302152172
Unit Count	1.0 Count

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