<https://woodshopbits.com/products/4-3-4-inch-coping-saw/#product>
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"This coping saw can be adjusted to any angle, providing the best approach to your work. The tension is adjusted be means of turning the handle, and the saw frame accepts standard coping saw blades with pins. Blade can be adjusted to any angle, providing the best approach to your work. A quality tool that will last for many years.  Blades are high carbon steel, hardened and tempered to give clean controllable cutting action."
<https://woodshopbits.com/products/4-3-4-inch-coping-saw/>