Issues with creating a simple L-bracket part

This versatile Universal L Bracket is designed to work with many different V-Slot and Tee Slot extrusions

slot , o ; with finger piece , n , secured to said bracket by means of set L , for guiding and holding the metal strips in place ; the tongue , J

lucky count slot machine SYBDXJ Shop 6 Pcs Adjustable Slotted L Brackets, Black L Shaped Bracket with 3 Slots Holes, 4¼ x 2 inch Metal 90 Degree Joint Right Angle Corner Brace,

lobstermania 2 slot game This versatile Universal L Bracket is designed to work with many different V-Slot and Tee Slot extrusions