Ridgid 24587 Model HKO1810 1/2" to 4" Hydraulic Knockout is 1/2" to 4" Hydraulic Knockout Kit equipped with a hand pump. It weighs 61-1/4 pounds and the kit includes the pumps which is equipped with an internal safety relief valve. The ram and the pump have quick disconnect couplers. The kit is precision-ground 3-point punch/die sets with a capacity to 4" in 10-gauge mild or 16-gauge stainless steel.
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