These Demko Shark-Lock® replacement springs fit the following models: AD20.5 (Taiwan)
Reviews
5.0
12 ratings
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Yep, I should have put a hand towel over the knife while removing the scales. The spring zipped across the room at nearly the speed of light, warp factor 9! I found it a day after ordering these authentic replacement springs from Demko, but with 8 AD20.5s in my collection, it's good to have a few spares on hand. I might not be as lucky the next time. Well worth the cost and relief of future disappointment and delay if another one zings out at relativistic speed.
D
Darrin · August 22, 2026
Perfect!
Terry · June 16, 2026
They fit, hooray. It does make a difference using these over some ballpoint pen one, modified and smashed in.