450-10 injection molded plastic receptacle for full batten sails with no adjustment. Accepts 10mm studs from Schaefer slides and competitors systems. Fits flat battens up to 1.6" (40mm) x 0.20" (5mm) and round battens up to .5" (12.5mm) in diameter. Length 4-7/16" (110mm), Width 2-5/8" (65mm).