The Camalot Z4 is a single-stem cam that stays rigid in your hand, but flexes once placed to ensure that it stays put and does not walk when pulled directionally. Dual twisted cable construction on larger sizes provides uniform flex. The Z4 is an upgrade to the Camalot C3, with 4 sandblasted lobes for better holding power. RigidFlex stem stays rigid in-hand for easy placement, but flexes once placed to reduce walkin. Dual twisted cable construction on larger sizes provides uniform flex; Single cable construction on smaller sizes avoids buckling and reduces trigger profile.. Narrow head width for tight placements. Sandblasted lobes provide holding power. Lightweight yet durable Dynex sling with a unique color scheme for easy identification . Expansion range: 15.3-27.7 mm.. Strength: 9 kilonewtons. Weight: 61 grams. Spot clean. Made in USA..