Chrome Curb Feelers Deluxe Version. Do you remember these deluxe curb feelers (or Cat's whiskers)? They were the Cadillac of curb feelers! The stainless spring wire is 11" long. The fully adjustable clamp box will open up to 3/4". Notice how it is slotted for angle adjustment? Also, the adjustable piece can be rotated. Once you have those set you tighten the spring screw to finish that adjustment. Slick! This listing is for 2 whiskers as shown (you don't need them on the drivers side).