The SG11TM secure grip bolt-hole spreader can be used on all flange types with bolt-hole sizes ranging from 1.18" (30mm) to 1.54" (39mm). The collet holders are supplied with adjustable drive cones which can be adjusted outward from their central position allowing the tool to spread flanges apart and remove a spacer, wafer, or butterfly valve. This mid-end, mechanical model offers up to 12.3 imperial tons (110 kN) of spreading force. Spreading force of 24.6 imperial tons (220 kN) if used in pairs as recommended. Short Collet Holder Sets (SCH) are available which can offer an improved range of application. Collet Holders can also be dismantled and inserted through bolt-holes from the opposite side.