M&G White Large Double Clutch" Double Knock" Mechanical Pencil-.5mm- RARE as most companies dont make themComfort contour grip, ball bearing in clip, durable and refillable- Note : NO ERASER IN PENCILAdouble-clutch mechanical pencil(or double-knock) isa type of mechanical pencil where a first click extends the lead sleeve (guide pipe), and a second click disengages the internal clutch to advance the lead, offering a smoother, more controlled feed than standard single-knock pencils, often with a retractable tip for protection, ideal for precise drafting and drawing.How it Works:
- First Click (Sleeve Extension):Pressing the top button once extends the metal sleeve (nose cone) that guides the lead.
- Second Click (Lead Feed):Pressing the button again opens the internal clutch, allowing the lead to slide forward.
- Locking:Releasing the button closes the clutch, holding the lead firmly in place.
Key Features:
- Dual Action:The two-step process controls both the sleeve and the lead.
- Retractable Sleeve:The tip retracts, protecting the lead and sleeve from damage when not in use, notes Dave's Mechanical Pencils.
- Precise Control:Allows for fine adjustments and controlled lead advancement, making it popular for drafting.
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