Editing Double-Knock mechanism (section)

== Double-knock pencil models ==
{| class="wikitable sortable"
|-
! Brand !! Model name !! Additional Features
|-
| Alvin ||Draft-Tec Retrac || 4mm drafting tip
|-
| Aristo || DK2 || Twist-extendable eraser
|-
| Baile || Double Nib 538 ||
|-
| Colleen ||Jib WK-816 ||
|-
| Colleen ||Jib WK-1051||
|-
| Cult Pens || Cult Pencil || Side button to retract the tip; metal body
|-
| Fuji Corona ||No. 205-03 Mecha-Pen || 4mm drafting tip
|-
| Linex || DP 1000|| Side button to retract the tip
|-
| Linex || DP 2000|| Twist-extendable eraser; 4mm drafting tip
|-
| Manufactum || Druckbleisift Messing|| Side button to retract the tip
|-
| Niji || Grip 350DX || Twist-extendable eraser
|-
| Ohto || Horizon || Auto advance mechanism; side button to retract the tip; metal body
|-
| Ohto || OP-500<ref>https://unsharpen.com/what-is-a-double-knock-pencil/</ref> || Spring loaded clip to retract the tip
|-
| Olympia || Double Knock ||
|-
| Pacific Arc || RDP-405 ||
|-
| Pacific Arc || RDP-605 || Twist-extendable eraser
|-
| Paper Mate || Apex || Twist-extendable eraser
|-
| Penac || Double Knock ||
|-
| Pentel || Graph Gear 1000 || Spring loaded clip to retract the tip; metal body; lead hardness indicator
|-
| Pentel || Technica-X || 
|-
| Pentel || Flex Fit || Spring loaded clip to retract the tip; ergonomic rubber grip (also customisable in the Flex Fit II)
|-
| Pentel || TranXition || Spring loaded clip to retract the tip
|-
| Pensan || IQ - My-IQ - IQ Duo || Twist-extendable eraser. Ergonomic double injection grip section made by Kotobuki Co. Ltd Japan.
|-
| Pilot || Vanishing Point || Lead hardness indicator
|-
| Pilot || Automac || Auto advance mechanism; metal body
|-
| Pilot || Delful The Shaker || [[Shaker mechanism]] with lead lock when the tip is retracted
|-
| Platinum || W-Knock MH-120 ||
|-
| Pyramid || SP-60 Double Knock ||
|-
| [[Rotring]] || Esprit double push R5033312 || Side button to retract the tip
|-
| [[Rotring]] || Initial R504340 ||
|-
| [[Rotring]] || Rapid || Twist-extendable eraser
|-
| Serve || Swell || Twist-extendable eraser
|-
| Senator || Avantic ||
|-
| Spaper || Technic Retro ||
|-
| Stabilo || Microtom 3365 || 
|-
| Staedtler || Retro 778 ||
|-
| Staedtler || Retro de Luxe 778 25 || Premium chromed steel body
|-
| Sun-Star || W Knock Sharp ||
|-
| Tomato || Hidden Nib HN-50 ||
|-
| Tombow || Protect SH-WPS ||
|-
| You & Me || DBL-KNOCK ||
|}

[[Category:Pencil]]
[[Category:Mechanical Pencil]]