Trident for Howard type harrow and grubber in steel The Howard type trident is an accessory for the harrow and grubber anchors which may need to be replaced due to wear during work. The trident for harrow is made of high resistance tempered steel, entirely produced in Italy. Trident technical characteristics for harrow: Arm angle: 120° Arm length: 100.5mm Thickness: 15mm Hole diameter: 20 mm Hole eyelet width: 28mm Center-hole distance: 82 mm_x000D_Material High resistance steel Production Made in Italy Applications Harrow and grubber Weight 1.70 kg Length 100.5mm Radius 82mm Holes 20 mm Thickness 15 mm