High-Quality Materials: The Radius Jig is made of high-quality ABS material, which is sturdy, corrosion-resistant, simple in construction, hard, and surprisingly tensile. Safe Design: The Router Jig features an ergonomic and innovative 3-hole design that makes it easy to stabilize the jig and protect your hands from cutting bits. Positioner Set: You will receive 4pcs of Sharpening Angle Gauges, including 8 types of corners: R5, R10, R15, R20, R25, R30, R35, R40. Wide Range of Applications: The router jigs are small, lightweight, and easy to carry and store, ideal for woodworking: shelves, chairs, frames, and corners in wood.