A simple device that takes all of the guesswork out of cutting plaster coving. Unlike other mitre blocks the Wonder Mitre sits on the inside of the cove and has shaped notches that fit the coving holding it fast whilst the material is being cut. Suitable for all coving up to 125mm the Wonder Mitre is cleverly angled making the cutting of angles exceptionally easy. So if your walls are reasonably square there will be very little finishing needed to create perfect mitres every time. Supplied with comprehensive instructions.