This architectural drawing is HOOK PIN CLAMPS FOR SHEET METAL PART CLAMPING in AutoCAD 2D drawing, dwg file, CAD file. A pin clamp, also known as a pneumatic pull-down clamp or an underbody clamp, is a clamping and centering tool that has a pin with a hook mechanism within that has a diameter ranging from 16 mm to 40 mm. For more details and information download the drawing file. Thank you for visiting our website cadbull.com.