Six serrations (unevenness) are provided on the outer circumference of the insertion part, and knurling is applied. It is a two-stage utilization type that can be fixed straight by swinging 15 degrees and inserting the socket all the way.
Six serrations (unevenness) are provided on the outer circumference of the insertion part, and knurling is applied. It is a two-stage utilization type that can be fixed straight by swinging 15 degrees and inserting the socket all the way.
in 34 offers
last seen 29 Oct 2026
The lowest price we last saw for Koken Wobble Fix Extension Set 3/8" Drive 6 Piece 32mm-250mm KOPK3763/6 was $90.00 at Discount Trader, compared across 16 retailers (last seen 29 Oct 2026). Prices may have changed since.
The all-time low we recorded was $85.00 on 1 Oct 2025.
Prices last updated 29 Oct 2026.
Koken Wobble Fix Extension Set 3/8" Drive 6 Piece 32mm-250mm KOPK3763/6
Six serrations (unevenness) are provided on the outer circumference of the insertion part, and knurling is applied. It is a two-stage utilization type that can be fixed straight by swinging 15 degrees and inserting the socket all the way.
Six serrations (unevenness) are provided on the outer circumference of the insertion part, and knurling is applied. It is a two-stage utilization type that can be fixed straight by swinging 15 degrees and inserting the socket all the way.
Last updated at 29/10/2026 10:07:31
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Affiliate Disclosure: We may receive a small commission for purchases made through this link at no extra cost to you. This helps support our site. Thank you!
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originally posted on ebay.com
The heavy duty knurling on the end is awesome to use even if your hand is coated with oil, Koken awesome no nonsense quality , Every bit as good as snap on just not as shiny and 1/5th the price.. i beleive Koken invented this style of wobble extension bar
originally posted on ebay.com
The Koken brand is a real gem in the tool industry , so underrated and unknown & yet such high quality at a great price ( All their products are also still " Made in Japan " ) . This 3/8 Drive wobble extension set is a typical example , a much better buy then Gearwrench and better made . Maybe they are not as strong as Snap On but a Lot cheaper and with a greater angle of articulation ( which would also automatically mean weaker then the Snap On ) . The head were the ratchet goes is knurled for better grip but also has a hexagon shape instead of the normal round shape so they do not roll away easily " Brilliant " , such a minor feature yet so well thought out and helpful !
| Dimensions | 150 mm (length) |
| Weight | 560 g |
| Included Accessories | ABS Tray |
| Construction Material | Chrome molybdenum steel(SCM435) |
| Design Highlights | Wobble-Fix, Permits movement of up to a 15 degree angle (Wobble solution), Permitting no movement (Fix solution) |
Koken PK2346/6 1/4′′, 3/8”, 1/2" & 3/4" Square Drive Adaptor & Reducer Set 6 Piece - Made in Japan
Delivery between 2–11 Nov $17.95
Koken 3/8"Dr 6PC 32MM-250MM Wobble Fix Extension Set KOPK3763/6
Delivery between 3–9 Nov $12.90
Ko-Ken 6 Piece 3/8" Drive Wobble Fix Extension Set - KOPK3763/6
Free delivery
Koken 1/4′′ 3/8” 1/2′′ & 3/4′′ Square Drive Adaptor & Reducer Set 6 Piece
Free delivery
Affiliate Disclosure: We may receive a small commission for purchases made through this link at no extra cost to you. This helps support our site. Thank you!
[PK3763/6] Ko-ken 3/8"(9.5mm)SQ. Offset Extension Bar Set 6-Piece Set, in Set
Delivery $27.73
The heavy duty knurling on the end is awesome to use even if your hand is coated with oil, Koken awesome no nonsense quality , Every bit as good as snap on just not as shiny and 1/5th the price.. i beleive Koken invented this style of wobble extension bar
The Koken brand is a real gem in the tool industry , so underrated and unknown & yet such high quality at a great price ( All their products are also still " Made in Japan " ) . This 3/8 Drive wobble extension set is a typical example , a much better buy then Gearwrench and better made . Maybe they are not as strong as Snap On but a Lot cheaper and with a greater angle of articulation ( which would also automatically mean weaker then the Snap On ) . The head were the ratchet goes is knurled for better grip but also has a hexagon shape instead of the normal round shape so they do not roll away easily " Brilliant " , such a minor feature yet so well thought out and helpful !
| Dimensions | 150 mm (length) |
| Weight | 560 g |
| Included Accessories | ABS Tray |
| Construction Material | Chrome molybdenum steel(SCM435) |
| Design Highlights | Wobble-Fix, Permits movement of up to a 15 degree angle (Wobble solution), Permitting no movement (Fix solution) |
