【Application】This Jointer Blade Sharpener is designed for sharpening the blade cutting edge of woodworking Knifes and planer. The blades length can excess the Sharpening jig length. 【How to Use】Take off your blades from the planer, fix 2pcs blades into the two 45degree slots by opposite direction one by one, fasten the screw to grab blades securely. Make sure to keep the 2pcs blades flat and in the same level, then honing on the sandpaper from coarse to fine. 【Advantage】The Planer Blade Sharpening jig can Save your time to honing 2pcs blades in the same time, keep two blades always in the same cutting level, save your Planer Blades, save your money. 【Material】The planer Knife Sharpening Jig is made of hollow aluminum with excellent electroplating, which is much durable and anti-rust, can provide extra long service term. 【Dimension】Sharpening Jig L x W x H: 12"x 1-5/8" x 1-7/16". Blade slots depth is 1/4”, can hold the blades securely. Tighten screws and 1pcs hex L-wrench are included.