Stabila 37436 36" Type 196 Box Frame Spirit Level wtih Hand Holes Crystal clear vials readable in any direction with no change in accuracy tolerance Spring steel hairline indicators in vials. Best frame strength-to-weight ratio. Removable endcaps for scribing in corners and for reading tight header and sill openings. Rubber endcaps grip walls and do not leave marks. Fast and accurate installations Metal Hang hole for storing level on site. Large comfortable rubber hand holes.