For shortening and connecting Shimano 6 to 11-speed chains (HG-EV/HG-X/HG/IG/UG chains) and 1/2” x 1/8” (CN-NX10). Deluxe workshop quality Extra-large, ergonomic handles for better grip, more leverage, and comfort Special Shimano push pin ensures a secure fit of the connecting pin even with 10-/11-speed chains, allowing for smooth operation.