1-unit construction

No separate parts, preassembled so there is no contact under load except through the rolling balls

Center opening allows for center post and ease of centering the unit

Attaches easily to second surface even though hidden after it is fastened to first surface

Only 5/16" thick adds a minimum of height to item

(Can be recessed into surfaces, reducing space to 1/8"

) Triangle's large ball race designed for maximum stability

Bearing is interlocked

No rivet to work loose or bind