The SE series comes in three different sizes

Part number SE-1 uses standard type SF or SR

drill bushings with a 1/2"O.D. X 1/2" long. Has 3~3/16” slots

Standard bushing ID range .1405 ~.3438 (measures 1-1/4” x 8-3/8”)

Part number SE-2 uses standard type SF or SR

drill bushings with a 3/4" O.D. X 3/4" long. Has 3~1/4” slots

Standard bushing ID range .2812 ~.5625 (measures 1-1/2” x 9-1/16”)

Part number SE-3 uses standard type SF or SR

drill bushings with a 1" O.D. X 1" long. Has 1~1/2” slot

Standard bushing ID range .4687 ~.7812 (measures 2” x 8-1/16”)

All pivot 180 degrees horizontally at the end, and can be locked in to any position. TheSE-1 & SE-2 have three slots to increase clamping positioning,SE-3 has one. Any can be clamped down with c-clamps.

This is the bar of choice for many mechanics.