Pilot Delful Double Knock Mechanical Pencil - 0.5 mm - Black & Blue

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4.8 (18 reviews)
Check out this new retractable shaker mechanical pencil from Pilot! The pencil tip of this body can conveniently retract to protect the pencil tip, pockets and pencil cases from damage. Just push firmly on the top cap button to extend and retract the tip. When the tip is extended, you can shake the pencil to extend lead or click the top button. Pressing the cap firmly retracts the tip. The pencil body has a colored window that shows the two writing states, the off state "Deru" which means "to come out" and the on state "Furu" which means it is ready to "shake". Refillable with the Pilot HERFN-10 eraser.

Model NumberPILOT HDF-50R-BL
Weight1.0 ounces
Body Color Black
Body Material Plastic
Clip Material Plastic
Clippable Yes
Diameter - Grip 11.5 mm
Diameter - Max 12.3 mm
Eraser Included Yes
Grip Color Black
Grip Material Rubber
Knurled Finger Grip No
Lead Diameter 0.5 mm
Lead Grade Indicator No
Lead Sleeve Length 2.6 mm
Lead Type Graphite
Length - Body 14.8 cm
Length - Retracted 14.5 cm
Mechanism Shaker
Tip Material Metal
Tip Replaceable No

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Customer Reviews

This pencil is close...
December 9, 2010
Verified Purchase
This pencil is close to perfection! The body & grip make writing very comfortable. It has a really good weight to it and the shaker feature makes your writing experience easy and free flowing. It's a little bigger than what it looks like in the photo, but it's cool because your hands don't get tired when writing. 5 stars!
7 people found this helpful
this pencil is amazing....
May 12, 2011
Verified Purchase
this pencil is amazing. its great during a timed test when you have to get lead quick, you can just shake it and more lead comes out!! it also holds a good amount of lead and has a great eraser. if your even considering this pencil then consider no more. get it right away!!!!
6 people found this helpful
This pencil is great....
May 10, 2014
Verified Purchase
This pencil is great. A retractable mechanical pencil is great for carrying around. I used one for years, but lost it, and all the replacements I could find were cheaply made. This one is amazingly solid feeling and a joy to write with. I don't really care for the "shake" lead advance system - it works fine, but it is just as easy to press the button. However, a nice thing about it is that the weight for the "shake" mechanism gives this pencil a satisfying heft. This pencil does not feel disposable - I think I will be using it for years.
2 people found this helpful
This pencil is great...
February 5, 2015
Verified Purchase
This pencil is great for everyday use. The double knock mechanism is helpful in preventing lead breakage and just having that extra length, and the shaking lead advancement works so much better than average shaker pencils. The lock on the shaking is also extremely helpful to prevent random undesired shaking. This pencil is nice and thick and a bit heavier than your normal mechanical pencils which is nice every now and then. It writes very smoothly with almost no wobbling. The only issue I have that's a minor issue really, is that sometimes the tip unscrews a bit, which doesn't allow me to advance lead, and forces me to click to screw it back on. It happens quite often, but shouldn't be a major issue for such a nice pencil.
really solid and comfortable....
February 3, 2015
Verified Purchase
really solid and comfortable. The knock mechanism is firm yet comfortable, and the shaker feature is easy to use and doesn't have the springy hollow rattle that some cheaper shaker pencils have. What impresses me most is how solid the tip and lead advance mechanism is — there's no side-to-side play or flexibility.

Very nice product. I only wish I had more reasons/opportunities to use pencil