Chip relief reduces the torque needed to install them

You can think of them as a precision cutting tool that you use just once

so they always go in straight

Heavy duty steel construction

Reparación Permanente de Roscas en Barreno Ciego (Pulgadas) C-Sert Chip relief reduces the torque*INCLUDES INSTALL TOOLING AND CUTTING FLUID. View Selection Chart The patented C Sert system gives you quick and permanent repair of damaged threads, and prevents damage to OEM threads. C Serts' main characteristics are: 1) Self tapping C Serts require no tap because they are a tap. You can think of them as a precision cutting tool that you use just once, and that ends up staying in the part to provide you with new, permanent threads. 2) Self aligning