The SR is ideal if you suffer from a nickel allergy. It has a rubber coated handle that makes the handle nickel free. It is made from Supreme Stainless Alloy and has a Convex shape blade.

Material: Supreme Stainless Alloy 
Blade: Convex Shape 
Screw Type: Precision Flat 
Handle Shape: Straight 
LH/RH: Right Handed