Makes a perfect 90° joint by cutting complementary 45° ends. High-impact polycarbonate ensures durability and low-friction sliding. Pre-installed adjustable nylon pins provide a no-slop fit to mitre track. Through-slots in the base allow secure clamping. Can be easily drilled to add extended fences and stops. Fits standard 10 x 19mm (3/8 x 3/4") mitre slot. Size: 140 - 264mm (5-1/2 x 10-3/8"). Clamping face 191mm (7-1/2").