ISC RP251 Small Arborist Rigging Block

The next generation ISC Rigging Pulleys are up to 150% stronger than the equivalent ISC standard Rigging Pulley models!

• The new low-profile Springlock mechanism features a new Safelock locking button to offer further security and ease of use.
  • Simply push the Safelock button and turn the axle head 180° to the release position.
  • The Safelock button can be depressed and the pin head rotated in a continuous one-handed action.
  • When the device is in the open position, the locking pin on the axle is retained in the correct alignment. This means that the user does not need to rotate the axle in order to correctly align the axle pin with the groove in the pulley plate, in order to close the device. Once the axle is fully depressed and the axle spring is fully compressed, the axle head must then be rotated 180° (in either direction), at which point the Safelock button engages to lock the axle head in place.
• Sideplates are made from hot forged high-strength aluminium, and were reshaped to redistribute material and significantly improve performance under load to maximize strength.
• Unique axle/frame interlocking design uses heat-treated, hardened stainless steel axles which reduce the inherent tendency to deform or flex under extreme loads.
  • This increased strength by up to 150% over ISC's legacy blocks.
  • The 200 series is built to withstand even the toughest rigging jobs with ease.