Offset blades. The main feature of the offset blades is that during the cutting process your hand will be kept safely above the work Cold-formed blades. Cold-formed blades are 44% stronger than hot forged blades & requires 25% less cutting force because of more accurate blade tolerances. Compound leverage. Compound leverage means reduced pressure & faster & easier cutting. Long life spring. Long life spring for increased durability & reliability. Length: 225 mm. (8 3/4 in.) 20SR cuts straight & right curves.