The new PROTO – Baby SCS OS is the first 3” tall Baby SCS that is built to accept 1-3/8” (Oversized) handlebar columns used in many aluminum and titanium handlebars or 1-1/4” (Standard) handlebars using the included adapter shim. The Baby SCS OS also utilizes all of the same advanced features of the of the Sentinel SCS including: 8mm Low Profile Bolts (6mm Allen), Offset Slot and a Spreader Bolt. This is our most compatible and advanced Baby SCS to date!