Trend Professional Slotting & Grooving Cutters Keyhole Slotter - 9.5mm Diameter Ref: 35/0X1/4TC Key Features: A keyhole recess for picture hanging flush to the wall. Ref. 35/0 - No.8 & No.10 screw heads. Ref. 35/01 - No.10 & No.12 screw heads Not suitable for grooving applications Specification: D: 9.5 mm (metric diameter) D2: 4.5 mm (metric diameter) C: 4.5 mm (metric cut length) S: 5.5 mm OL: 40 mm (overall length) Shank Diameter: 1/4 inch