3d printing glass bed clips

3d printer heated beds works better with glass, but needs special clips to make sure there is no movement which can ruin the print 

I MADE THESE CLIPS TO HOLD THE-  (A)- GLASS BED + NORMAL ALUMINIUM BED FRAME OF THE CREALITY ENDER 3 = 6mm and (B) These clips are designed for  glass plate + aluminium bed = 4mm

(MY GLASS =2,8mm AND ALUMINIUM BED = 3mm TOTAL 5.8mm allowing a .01mm play both ways.............SO I'M USING 6mm)