Steel Shooting Targets - Coin Challenge Knockovers - Action Pistol and Rifle Set includes 20 knockovers of various sizes (3in. diameter and under) on 1in. x 2in. pads. These steel targets are great for air guns, 22LR rim-fire,.40 cal., 9mm, .45ACP and most other pistol calibers Manufactured from new 3/8in. thick A36 steel plate painted white Precision cut with a CNC plasma cutter Assembled using strong heavy duty welds Can be placed on and shot from any flat surface