The smaller diameter bits are used for trimming into tight corners

sanded or ground to any shape that suits the repair

Available in sizes 4"

which withstands both high and low temperatures

Base Dimension: 120 x 125mm

12mm x 1 Pair Solid Brass Concealed Hinge CH04 Manual Extracted Sanding Block The smaller diameter bits are12mm x 1 Pair Solid Brass Concealed Hinge CH04 How to use these hinges: Drill snug hole to suit chosen hing Remove small screws in each half of the hinge Insert Hinges in drilled holes, no need for glue ridges on hinge walls, help to hold hinges in place When hinges are in position, replace small screws in hinges and this will expand hinges a fraction Now you have an elegant hinge to close your box.