4 Inch Precision Double Square With 4R Graduations, Pro Grade Accuracy To ±0.002 Inch Over Blade Length, Hardened Stainless Steel Blade, Your Go To Workshop Tool For Machining And Layout
These handy double squares are indispensable for setting up machinery and performing a host of shop layout tasks. They are manufactured in accordance with EEC Class 1 accuracy standards and are guaranteed to be square to within 0.002 inch over the length of each blade. They have hardened and tempered no-glare satin chrome stainless steel blades. Blade markings are precision photo etched and then black filled for easy readability. Blades have Quick-Reading 4R markings (1/64ths and 1/32nds on one side and 1/8ths and 1/16ths on the reverse). Square heads are cast and then precision machined. Square head color is cobalt blue. Square heads lock down tight via locking knob. Squares come in a cardboard box. Available in with either a 4” or 6” blade. Spare blades and locking screws are also available.
These 4 inch precision double squares are essential tools for machining and layout in workshops, offering reliable squareness and clear measurement reading for both setup and verification tasks.
✅ Blade width: 0.728 inch ± 0.01 inch
✅ Blade thickness: 0.078 inch ± 0.008 inch
✅ Blade groove: 0.86 inch wide and 0.03 inch deep
✅ Graduations: Quick Reading 4R (1/8, 1/16, 1/32, 1/64)
✅ Head thickness: 0.472 inch ± 0.02 inch
✅ Head width: 0.084 inch ± 0.02 inch
✅ Head height: 2.36 inch ± 0.02 inch
✅ Blade finish: no-glare satin chrome
✅ Head color: cobalt blue; locking knob
✅ Packaging: cardboard box
✅ Blade length options: 4 inches or 6 inches
✅ Spare blades and locking screws available
💡 What is a precision double square used for in machining and layout tasks? A precise double square is a handy tool for getting true edges and marking straight, true lines in a shop setting. - checks squareness between surfaces and alignment of machine fixtures - handy for setting up milling and drilling equipment and marking layouts - features 4R graduations and hardened stainless blade for quick, accurate readings - locks with a secure knob to maintain alignment during operations