Spline Drive rotary Hammers are typically used with Carbide drill bits 1/2” – 1-1/2” and thick wall carbide core bits up to 4” (thin wall up to 6”). There are also many chipping, chiseling, bushing, cutting and digging bits that work well with the SDS Max tools. Most of the time the SDS Max & Spline drive tools are identical with simply different chuck retainers to distinguish the different models.