This saw is also called a keyhole saw or drywall saw,
is a long, narrow saw used for cutting small, often
awkward features in various building materials.
It is more commonly used in the modern construction.
It has a sharpened point at the tip of the blade which can be pushed or jabbed
through soft materials such as drywall without drilling a hole for the blade.
Specially this model has unique features which has adjustable length of blade and
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