Flat shaped housings are available with popular 25 lpi checkering preferred by many shooters, as well the latest Snakeskin, Chainlink, Chainlink II and Chainlink III patterns that provide a secure gripping surf ace without the 'sharpness' of machine cut checkering. Ed Brown 1911 Mainspring Housing - Bl/Fl Fits Gc - 25 Lpi CheckeringĬlassic and contemporary looking mainspring housings combine form and function, so there is no compromise in grip control even though they look great.