1515-LS IS A 1.50" X 1.50" LITE FRACTIONAL 15 SERIES SQUARE T-SLOT PROFILE WITH FOUR OPEN T-SLOTS, ONE ON EACH 1.50€ FACE. THE PROFILE IS SMOOTH, WHICH MAKES IT RESISTANT TO DIRT AND DEBRIS BUILDUP WHILE ALSO BEING EASY TO CLEAN. THE 1515-LS PROFILE IS COMPATIBLE WITH ALL 15 SERIES FASTENERS. THIS PROFILE LENDS ITSELF TO CLEAN ROOM APPLICATIONS, GUARDS, ENCLOSURES, OR WORKSTATIONS. THE FOUR OPEN T-SLOTS ENABLE ACCESS FROM ANY DIRECTION AND ARE USEFUL FOR MOUNTING ACCESSORIES.,