WIDELY APPLICABLE SIZE- This featherboards compatible with for PRS3020 use in standard 3/8inch & 3/4inch (9mm & 19mm) miter slot or t-slot, and associated with wedge-lock system and split rail miter bar construction provide maximum hold for bandsaw, table saw and router tables fence. ACCURACY OF CUTS & SAFETY FIRST - The purpose of featherboard is to prevent fingers from slipping into the saw blade. Feather board can help ensure an accurate cut by securing a workpiece against the fence when you are cutting, giving a nice and clean cut on that edge and reduce wood kickback, which makes it a safer working environment for you. Every woodworker needs a professional featherboard. DURABLE, RELIABLE & ERGONONMIC DESIGN - The featherboards are made of an extremely durable plastic composite body & has an innovative & a simplified design that have special angled fingers & full of toughess apply steady & pressure so this kit possesses additional hardware for adaptive mounting solutions, including miter slot brackets for horizontal mounting, vertical mounting for tracks and plastic spacers for featherboards. SAFE AND CONVENIET DESIGN: Our Featherboard have Dual Safety Lock-System design to reduce risk of vibration and loose safer than featherboard has Single System design. colour: blue Material: plastic Size: about 165x130mm Package Contents: 4 x Featherboard