1050 IS A 1.00" X 0.50" FRACTIONAL 10 SERIES RECTANGULAR T-SLOT PROFILE WITH ONE OPEN T-SLOT ON ONE 1.00" FACE. THE PROFILE HAS ALIGN-A-GROOVES TO ASSIST IN ALIGNMENT WHEN CONNECTING PROFILES. THE 1050 PROFILE IS COMPATIBLE WITH 10 SERIES FASTENERS. IT IS A THINNER PROFILE THAT CONNECTS EASILY TO FLAT SURFACES AND WORKS WELL AS A SUPPORTING STRUCTURE OR SPACER FOR MOUNTING ACCESSORIES SUCH AS HANDLES, DOOR TRACKS, RAILS, VALVES OR SENSORS.,