1,groove joint plier D4type ,Matt finished(Spurt sand) 2,used high quality material 1. Type: 5" 6" 8" 10" 12" 15"2. Dipped pvc handle or heavy duty handle3. Materials: 55# high carbon steel or chromium steel or stainless steel etc. 4. Surface treatment: Spurt sand,Pearl-nickel plated,Chrome plated, blackening, common polish etc.5. Standard:TUV/GS. Groove Joint Plier