The SteamPunk UltraLink with Mokume Insert is a beautiful option for EDC key carry.  The Leather strap fits belts up to just over 1.5" wide.  Scales are Phosphor Bronze with Swiss Turn countersunk fillister head brass screws.  The core pieces are 2 color Mokume-Gane and the spring clip is Grade 5 Titanium.

SteamPunk Clipless UltraLink Mokume