Universal open-backed design. For use on plasterboard, wood, plastic & metal profiles. Compatible with Silverline, GMC and Triton Oscillating Multi-Tools, and also tool-free, quick-change, and standard multi tool machines. Universal open-backed design. For use on plasterboard, wood, plastic & metal profiles. Compatible with Silverline, GMC and Triton Oscillating Multi-Tools, and also tool-free, quick-change, and standard multi tool machines.